CA1125984A - Dimensionally stable wood flooring - Google Patents
Dimensionally stable wood flooringInfo
- Publication number
- CA1125984A CA1125984A CA340,249A CA340249A CA1125984A CA 1125984 A CA1125984 A CA 1125984A CA 340249 A CA340249 A CA 340249A CA 1125984 A CA1125984 A CA 1125984A
- Authority
- CA
- Canada
- Prior art keywords
- fillets
- wood
- gaps
- flooring
- fillet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/04—Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Floor Finish (AREA)
Abstract
Abstract of the Disclosure A dimensionally stable wood flooring highly resistant to deterioration because of variations in environmental humidity and temperature employs individual wood fillets separated by a highly compressible synthetic foam spacer. Because the foam spacer accommodates large fillet dimensional changes, the fillets may be wider than previously used or made of less inherently dimensionally stable woods.
Description
~1~59~ .
Background of the Invention This invention relates to wood flooring and more particularly to an improved, dimensionally stable wood flooring which is highly resistant to deterioration ` 5 because of variations in humidity and temperature.
` It is well known that wood flooring fillets -`~ expand and contract significantly when exposed to changes in temperature and humidity. This dimensional instability has been a serious problem in wood floors, especially those in which the wooa strips or fillets are not secured to one another by means of a backing material, but rather are adhered directly to a subfloor.
Such a floor is subject to buckling if inadequate space is provided between the fillets so that upon expansion they press unduly against one another. To prevent buckling, some prior floors employed relatively lar~e gaps between adjacent fillets. Not only are large gaps unsightly, but they can become filled with dirt and grit, efectively diminishing the available expansion space. In other floors t especially those covering large areas, adjacent tiles made up of a plurality of fillets have been laid with their grains running in alternate directions. Because woods expand and contract by differing amounts in different directions with respect to grain orientation, such a parquet arrangement limits dimensional changes across the ~aps separating contiguous tiles, thereby reducing the likelihood of buckling.
One approach to solving the dimensional instability problem has been to fill the gaps with a flexib]e bonding material which has sufEicient compressibility to accommodate the maximum change in gap width. See, for example, U.S. Patent No. 3,36S,850 in which the preferred bonding material is a blend of chloroprene synthetic rubber, esterified rosin and an antioxidant. Although this material remains flexible, ., ~
~5984
Background of the Invention This invention relates to wood flooring and more particularly to an improved, dimensionally stable wood flooring which is highly resistant to deterioration ` 5 because of variations in humidity and temperature.
` It is well known that wood flooring fillets -`~ expand and contract significantly when exposed to changes in temperature and humidity. This dimensional instability has been a serious problem in wood floors, especially those in which the wooa strips or fillets are not secured to one another by means of a backing material, but rather are adhered directly to a subfloor.
Such a floor is subject to buckling if inadequate space is provided between the fillets so that upon expansion they press unduly against one another. To prevent buckling, some prior floors employed relatively lar~e gaps between adjacent fillets. Not only are large gaps unsightly, but they can become filled with dirt and grit, efectively diminishing the available expansion space. In other floors t especially those covering large areas, adjacent tiles made up of a plurality of fillets have been laid with their grains running in alternate directions. Because woods expand and contract by differing amounts in different directions with respect to grain orientation, such a parquet arrangement limits dimensional changes across the ~aps separating contiguous tiles, thereby reducing the likelihood of buckling.
One approach to solving the dimensional instability problem has been to fill the gaps with a flexib]e bonding material which has sufEicient compressibility to accommodate the maximum change in gap width. See, for example, U.S. Patent No. 3,36S,850 in which the preferred bonding material is a blend of chloroprene synthetic rubber, esterified rosin and an antioxidant. Although this material remains flexible, ., ~
~5984
-2-it is of limited compressibility 50 that only a relatively small portion of the gap thickness is available for fillet expansion.
The limited compressibility and expandability of the previously used gap filling materials have several disadvantages. First, since much of the gap width cannot be utilixed, the maximum amount of expansion of a fillet for a given gap width must be limited. One means of bounding expansion has been to limit the maximum width of the fillet to approximately one inch. Another means has been to orient the fillet with respect to the wood grain so that the surface adjacent to the gap is the flat grain face. It is known that dimensional changes transverse to the flat grain faces are less than for other grain orientations. A
third'way to control the amount of dimensional change is to use woods with inherent dimensional stabili~y. Woods `1' such as beech and gumwood have accordingly been avoided in the past because they are less dimensionally stable than other woods, such as oak and maple. Again, because of the limited elasticity of the previously used'binding material in the gap, high shear stresses develop between fillets during expansion, requiring very rigid adhesive to prevent the fillet from breaking away from the subfloor. Each of these constraints imposed by the prior gap-filling materials adds considerably to the cost of the finished floor.
It is, therefore, an object of the present invention to provide dimensionally stable wood flooring having a highly compressible gap-filling mater'ial between the wood fillets, that is, a material which can be compressed to a small fraction of its unstressed thickness.
It is a further object of the invention to provide a gap filler that allows the use of wider ~5~
~illets or planks made up of multiple fillets, and eliminates the need to alternate -the grain direction of adjacent planks, especially advantageous in floors covering large open areas~
Other objects, features and advanta~es of the present invention will become apparent in what follows.
Summary of the Inven-tion Broadly speaking, the above objects are me-t by the present invention which provides dimensionally stable wood flooring comprising wood fillets separated by gaps, each fillet having a width no greater than approximately t~o inches and each gap having a width less than one-eighth inch-and larger than one- -sixty-fourth inch, wherein each of the fillets (A) is elongated in the direction of the wood grain; (B) has a subs-tantially rectangular cross-section; (C) is axranged for being secured to ; a subfloor with an adhesive; and (D) further characterized in that a compressible synthetic foam ma-terial fills the gaps and joins the fillets together, the foam material having flexibili-ty, compressibility and expandability sufficien-t to span continuously the gaps under substantially all environmen-tal conditions of expansion and contraction of the fillets when secured to a sub-floor, and wherein -the foam material is a preformed sheet adapted to fit into and fill the gaps between the fillets.
: The invention may also be seen as providing the manufacture of dimensionally stable wood flooring for securing to a subfloor and comprising wood fillets separated by gaps, each illet being elongated in the direc-tion of the wood grain and having a subs-tantially rectanyular cross-section, -the .im-provement comprising the steps of (A) selecting a compressible synthetic foam material in sheet form charac-terized by flexibill-ty, compressibili-ty and expandab.ility sufficien-t to span continuously the gaps under substantially all condi-tlons of environmental ex-pansion and contrac-tion of -the fillets upon being secured -to a subfloor, (B) in-troducing the sheet material i.nto the inter-. , -`'-~" jr/~ - 3 -~5913g fillet gaps, and (C) adhering the sheet material to the fillets to join the fillets into wood 100ring sheets.
Brief Des _ ption of the Drawings ` -- ' The invention disclosed herein may he better under-stood with reference to the following drawings of which:
Fig. 1 is a partly exploded view of a preassembled wood flooring tile embodying the invention; and Fig. 2 is an end elevation view o-E the installed flooring under the condition of extreme expansion.
Description of the Preferred Ernbodiments :
Referring now to Fig. 1, a representative flooring tile 10 has been partly exploded to show better an individual wood fillet 18. In this figure, the wood grain runs along the length of the fillet 18 and the fillet is cut so that the edge grain surface 1s the wearing surface 20, that is, the lines 22 that demarcate the growth rings on the tree from which the r fillets 18 are cut extend substantially between the upper and lower surfaces of each fillet. Hence, the latera] surfaces 24 of each fillet are the flat grain surfaces~ It is to be stressed that wood fillet 18 need not have been cut so that the lateral surfaces 24 on each fillet are the flat ~' ' ' .
; grain surfaces. Although it is advantageous to orient the fillets in this way because dimensional stability transverse to the grain lines 2~ is about twice the dimensional stability along the grain lines, it is S unnecessary to do so because the foam material filling the gap according to this invention can accommodate larger expansions of the fillets.
Again because the foam gap-filling material can accommodate greater fillet expansion, individual fillets made from dimensionally stable wood species can - be up to two inches in width with a gap width between fillets no greater than that in floors having narrower fillets, e.g., gap widths in the range of 1/64 to l/16 inch. When, however, wider fillets are fashioned from less dimensionally stable wood species, gaps between adjacent fillets will be larger, up to approximately l/8 inch, to accommodate the expected greater dimensional changes.
Referring now to Fig r 2, gaps 30 between fillets 18 are filled with foam layer 26. Foam layer 26 may be formed in place or it may be made of a preformed foam sheet bonded to the adjacent fillets. A suitable material for forming foam layer 26 in place is a blend ~ of chloroprene synthetic rubber, esterified rosin, and ; 25 an anti-oxidant as disclosed in U.S. Patent ~oO
The limited compressibility and expandability of the previously used gap filling materials have several disadvantages. First, since much of the gap width cannot be utilixed, the maximum amount of expansion of a fillet for a given gap width must be limited. One means of bounding expansion has been to limit the maximum width of the fillet to approximately one inch. Another means has been to orient the fillet with respect to the wood grain so that the surface adjacent to the gap is the flat grain face. It is known that dimensional changes transverse to the flat grain faces are less than for other grain orientations. A
third'way to control the amount of dimensional change is to use woods with inherent dimensional stabili~y. Woods `1' such as beech and gumwood have accordingly been avoided in the past because they are less dimensionally stable than other woods, such as oak and maple. Again, because of the limited elasticity of the previously used'binding material in the gap, high shear stresses develop between fillets during expansion, requiring very rigid adhesive to prevent the fillet from breaking away from the subfloor. Each of these constraints imposed by the prior gap-filling materials adds considerably to the cost of the finished floor.
It is, therefore, an object of the present invention to provide dimensionally stable wood flooring having a highly compressible gap-filling mater'ial between the wood fillets, that is, a material which can be compressed to a small fraction of its unstressed thickness.
It is a further object of the invention to provide a gap filler that allows the use of wider ~5~
~illets or planks made up of multiple fillets, and eliminates the need to alternate -the grain direction of adjacent planks, especially advantageous in floors covering large open areas~
Other objects, features and advanta~es of the present invention will become apparent in what follows.
Summary of the Inven-tion Broadly speaking, the above objects are me-t by the present invention which provides dimensionally stable wood flooring comprising wood fillets separated by gaps, each fillet having a width no greater than approximately t~o inches and each gap having a width less than one-eighth inch-and larger than one- -sixty-fourth inch, wherein each of the fillets (A) is elongated in the direction of the wood grain; (B) has a subs-tantially rectangular cross-section; (C) is axranged for being secured to ; a subfloor with an adhesive; and (D) further characterized in that a compressible synthetic foam ma-terial fills the gaps and joins the fillets together, the foam material having flexibili-ty, compressibility and expandability sufficien-t to span continuously the gaps under substantially all environmen-tal conditions of expansion and contraction of the fillets when secured to a sub-floor, and wherein -the foam material is a preformed sheet adapted to fit into and fill the gaps between the fillets.
: The invention may also be seen as providing the manufacture of dimensionally stable wood flooring for securing to a subfloor and comprising wood fillets separated by gaps, each illet being elongated in the direc-tion of the wood grain and having a subs-tantially rectanyular cross-section, -the .im-provement comprising the steps of (A) selecting a compressible synthetic foam material in sheet form charac-terized by flexibill-ty, compressibili-ty and expandab.ility sufficien-t to span continuously the gaps under substantially all condi-tlons of environmental ex-pansion and contrac-tion of -the fillets upon being secured -to a subfloor, (B) in-troducing the sheet material i.nto the inter-. , -`'-~" jr/~ - 3 -~5913g fillet gaps, and (C) adhering the sheet material to the fillets to join the fillets into wood 100ring sheets.
Brief Des _ ption of the Drawings ` -- ' The invention disclosed herein may he better under-stood with reference to the following drawings of which:
Fig. 1 is a partly exploded view of a preassembled wood flooring tile embodying the invention; and Fig. 2 is an end elevation view o-E the installed flooring under the condition of extreme expansion.
Description of the Preferred Ernbodiments :
Referring now to Fig. 1, a representative flooring tile 10 has been partly exploded to show better an individual wood fillet 18. In this figure, the wood grain runs along the length of the fillet 18 and the fillet is cut so that the edge grain surface 1s the wearing surface 20, that is, the lines 22 that demarcate the growth rings on the tree from which the r fillets 18 are cut extend substantially between the upper and lower surfaces of each fillet. Hence, the latera] surfaces 24 of each fillet are the flat grain surfaces~ It is to be stressed that wood fillet 18 need not have been cut so that the lateral surfaces 24 on each fillet are the flat ~' ' ' .
; grain surfaces. Although it is advantageous to orient the fillets in this way because dimensional stability transverse to the grain lines 2~ is about twice the dimensional stability along the grain lines, it is S unnecessary to do so because the foam material filling the gap according to this invention can accommodate larger expansions of the fillets.
Again because the foam gap-filling material can accommodate greater fillet expansion, individual fillets made from dimensionally stable wood species can - be up to two inches in width with a gap width between fillets no greater than that in floors having narrower fillets, e.g., gap widths in the range of 1/64 to l/16 inch. When, however, wider fillets are fashioned from less dimensionally stable wood species, gaps between adjacent fillets will be larger, up to approximately l/8 inch, to accommodate the expected greater dimensional changes.
Referring now to Fig r 2, gaps 30 between fillets 18 are filled with foam layer 26. Foam layer 26 may be formed in place or it may be made of a preformed foam sheet bonded to the adjacent fillets. A suitable material for forming foam layer 26 in place is a blend ~ of chloroprene synthetic rubber, esterified rosin, and ; 25 an anti-oxidant as disclosed in U.S. Patent ~oO
3,365,850, with a foaming agent such as bicarbonate of soda added. This blend produces a hi~hly compressible, closed cell foam. Foam layer 26 may also be cut from a preEormed sheet of neoprene or polyethylene. A suitable neoprene is number 4,002 manufactured by Tenneco Chemicals, Inc., General Foam Division, Carlstadt, New Jersey, and a suitable polyethylene sheet is Volara Type E manufactured by Voltek, Inc. of Lawrence, Massachusetts. When preformed sheet is used as foam layer 26, a suitable adhesive is used to bond the preformed sheet of foam to the adjacent wood fillets.
.
, ~125984 ::
: Use of preformed foam materials simpllfies both the manufacturing process and also the machinery required to assemble the fillets within a single flooring tile.
Such use of preformed foam also substantially increases the hourly output capacity of an assembly system, ~ thereby reducing production costs.
:
The fillets 18 are preassembled to form tiles with a gap of 1/64 inch to 1/8 inch between contiguous fillets. This gap width is generally sufficient to accommodate the maximum dimensional change in fillet width. With a gap width within this range, it has been found that the foam layer 26 continuously spans and substantially fills the gaps under all conditions o fillet expansion and contraction. This is particularly important in excluding dirt from the gaps under extreme contraction.
~ .
As shown in Fig. 2r the tile is secured to the ~ .
suhfloor 16 with an adhesive 28 that holds the fillets in place against the forces that develop durin~ the 20 dimensional changes due to temperature and humidity.
Because foam layer 26 disposed between adjacent fillets 18 is highly compressibley the forces which develop between the individual fillets are not high. This permits the use of a less rigid and less costly adhesive 25 28 such as standard rubber-based wood block adhesive to secure the tiles to the subfloor. The use of a less rigid adhesive imparts a greater degree of flexibility to the tiles thereby permitting them to conform more readily to irregularities in the subfloor 16.
Referring still to Fig. 2, the illustrated fillets 18a, 18b, and 18c are shown under the condition of maximum expansion as caused by high environmental temperature and humidity, for example. Note, however, that the gaps 30 still remain between adjacent fillets 35 and the continuous foam layers 26 separate the fillets~
. . ...
The dimensionally stable wood flooring disclosed herein, therefore, comprises wood fillets separated by a synthetic foam layer which is highly compressible. Because the foam layer can accommodate large amounts of compression, the wood fillets can be wider than previously used or even be cut so that the surface adjacent the gaps is a mixed grain or a flat grain surface. Incorporating a foam layer also permits the use of less dimensionally stable woods formerly thought inappropriate for wood flooringg such as gum and beechwood. Another advantage to be realized from the invention herein is the capability to construct stable floors of multiple fillets joined to form wide wooden planks~ illustratively of seven inches in width, laid substantially parailel and side-by-side, iOe., without the requirement to alternate grain directions. The ~invention disclosed herein, therefore, permits lower cost, yet dimensionally stable wood floors.
.
In view of the foregoing, it may be seen that the objects of the present invention have been achieved and other advantageous results obtained.
As various changes could be made in the above preferred embodiments without departing from the scope of the invention, it should be understood that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
.
What is claimed is:
.
, ~125984 ::
: Use of preformed foam materials simpllfies both the manufacturing process and also the machinery required to assemble the fillets within a single flooring tile.
Such use of preformed foam also substantially increases the hourly output capacity of an assembly system, ~ thereby reducing production costs.
:
The fillets 18 are preassembled to form tiles with a gap of 1/64 inch to 1/8 inch between contiguous fillets. This gap width is generally sufficient to accommodate the maximum dimensional change in fillet width. With a gap width within this range, it has been found that the foam layer 26 continuously spans and substantially fills the gaps under all conditions o fillet expansion and contraction. This is particularly important in excluding dirt from the gaps under extreme contraction.
~ .
As shown in Fig. 2r the tile is secured to the ~ .
suhfloor 16 with an adhesive 28 that holds the fillets in place against the forces that develop durin~ the 20 dimensional changes due to temperature and humidity.
Because foam layer 26 disposed between adjacent fillets 18 is highly compressibley the forces which develop between the individual fillets are not high. This permits the use of a less rigid and less costly adhesive 25 28 such as standard rubber-based wood block adhesive to secure the tiles to the subfloor. The use of a less rigid adhesive imparts a greater degree of flexibility to the tiles thereby permitting them to conform more readily to irregularities in the subfloor 16.
Referring still to Fig. 2, the illustrated fillets 18a, 18b, and 18c are shown under the condition of maximum expansion as caused by high environmental temperature and humidity, for example. Note, however, that the gaps 30 still remain between adjacent fillets 35 and the continuous foam layers 26 separate the fillets~
. . ...
The dimensionally stable wood flooring disclosed herein, therefore, comprises wood fillets separated by a synthetic foam layer which is highly compressible. Because the foam layer can accommodate large amounts of compression, the wood fillets can be wider than previously used or even be cut so that the surface adjacent the gaps is a mixed grain or a flat grain surface. Incorporating a foam layer also permits the use of less dimensionally stable woods formerly thought inappropriate for wood flooringg such as gum and beechwood. Another advantage to be realized from the invention herein is the capability to construct stable floors of multiple fillets joined to form wide wooden planks~ illustratively of seven inches in width, laid substantially parailel and side-by-side, iOe., without the requirement to alternate grain directions. The ~invention disclosed herein, therefore, permits lower cost, yet dimensionally stable wood floors.
.
In view of the foregoing, it may be seen that the objects of the present invention have been achieved and other advantageous results obtained.
As various changes could be made in the above preferred embodiments without departing from the scope of the invention, it should be understood that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
.
What is claimed is:
Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Dimensionally stable wood flooring comprising wood fillets separated by gaps, each fillet having a width no greater than approximately two inches and each gap having a width less than one-eighth inch and larger than one-sixty-fourth inch, wherein each of said fillets A. is elongated in the direction of the wood grain;
B. has a substantially rectangular cross-section;
C. is arranged for being secured to a subfloor with an adhesive; and D. further characterized in that a compressible synthetic foam material fills said gaps and joins said fillets together, said foam material having flexibility, compressibility and expandability sufficient to span continuously said gaps under substantially all environmental conditions of expansion and contraction of said fillets when secured to a subfloor, and wherein said foam material is a preformed sheet adapted to fit into and fill said gaps between said fillets.
B. has a substantially rectangular cross-section;
C. is arranged for being secured to a subfloor with an adhesive; and D. further characterized in that a compressible synthetic foam material fills said gaps and joins said fillets together, said foam material having flexibility, compressibility and expandability sufficient to span continuously said gaps under substantially all environmental conditions of expansion and contraction of said fillets when secured to a subfloor, and wherein said foam material is a preformed sheet adapted to fit into and fill said gaps between said fillets.
2. The flooring according to claim 1 wherein said preformed sheet is neoprene foam.
3. The flooring according to claim 1 wherein said preformed sheet is polyethylene foam.
4. The flooring according to claim 1 further charac-terized in that said synthetic foam material comprises a blend of chloroprene synthetic rubber, esterified rosin, an anti-oxidant and foaming agent.
5. The flooring of claim 4 wherein said rosin is esterified with pentaerythritol and said foaming agent is bicarbonate of soda.
6. In the manufacture of dimensionally stable wood flooring for securing to a subfloor and comprising wood fillets separated by gaps, each fillet being elongated in the direction of the wood grain and having a substantially rectangular cross-section, the improvement comprising the steps of A. selecting a compressible synthetic foam material in sheet form characterized by flexibility, compressibility and expandability sufficient to span continuously said gaps under substantially all conditions of environmental expansion and contraction of said fillets upon being secured to a sub-floor, B. introducing said sheet material into said inter-fillet gaps, and C. adhering said sheet material to said fillets to join said fillets into wood flooring sheets.
7. A method according to claim 6 comprising the further step of adhering said wood flooring sheets to a sub-floor.
8. A method according to claim 6 wherein said select-ing step provides a sheet material comprising a blend of chloro-phrene synthetic rubber, esterified rosin, an anti-oxidant, and a foaming agent.
9. A method according to claim 6 further characterized in that each fillet has a width no greater than approximately two inches and each gap has a width less than one-eighth inch and larger than one-sixty-fourth inch.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US96309478A | 1978-11-22 | 1978-11-22 | |
| US963,094 | 1978-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1125984A true CA1125984A (en) | 1982-06-22 |
Family
ID=25506742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA340,249A Expired CA1125984A (en) | 1978-11-22 | 1979-11-20 | Dimensionally stable wood flooring |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0020689A1 (en) |
| CA (1) | CA1125984A (en) |
| WO (1) | WO1980001089A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005098164A1 (en) * | 2004-04-06 | 2005-10-20 | Plante Rejean | Flooring system and method of installing same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3807291A1 (en) * | 1988-03-05 | 1989-09-14 | Fels Werke Gmbh | METHOD FOR CONNECTING THE JOINTS OF BUILDING BOARDS |
| FR2811355B1 (en) * | 2000-07-05 | 2003-06-20 | Geroclair Sa | PARQUET ELEMENT WITH COMPENSATING JOINTS |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1756583A (en) * | 1928-10-24 | 1930-04-29 | Brooke W Cadwallader | Expansion and shrinkage take-up in block and plank flooring |
| US1890954A (en) * | 1930-07-16 | 1932-12-13 | Evans Auto Loading Co Inc | Filler strip for floors and other constructions |
| US1913290A (en) * | 1931-07-24 | 1933-06-06 | Byrd C Rockwell | Inlay flooring construction |
| US2277892A (en) * | 1938-07-07 | 1942-03-31 | Celotex Corp | Flooring construction |
| US3365850A (en) * | 1965-03-03 | 1968-01-30 | Mari & Sons Flooring Co Inc | Dimensionally stable wood flooring |
| US3334557A (en) * | 1965-04-29 | 1967-08-08 | Phelan Faust Paint Mfg Company | Polyurethane concrete slab sealer |
| US3629986A (en) * | 1969-12-22 | 1971-12-28 | Mfg Associates Inc | Expansion joint filler |
| JPS5420187Y2 (en) * | 1974-11-26 | 1979-07-23 |
-
1979
- 1979-11-20 WO PCT/US1979/000998 patent/WO1980001089A1/en unknown
- 1979-11-20 CA CA340,249A patent/CA1125984A/en not_active Expired
-
1980
- 1980-06-04 EP EP19800900047 patent/EP0020689A1/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005098164A1 (en) * | 2004-04-06 | 2005-10-20 | Plante Rejean | Flooring system and method of installing same |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0020689A1 (en) | 1981-01-07 |
| WO1980001089A1 (en) | 1980-05-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |