US3335723A - Indwelling catheter unit - Google Patents

Indwelling catheter unit

Info

Publication number
US3335723A
US3335723A US41536864A US3335723A US 3335723 A US3335723 A US 3335723A US 41536864 A US41536864 A US 41536864A US 3335723 A US3335723 A US 3335723A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
catheter
needle
end
tube
sleeve
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 - Lifetime
Application number
Inventor
Jr Leonard F Waldman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baxter International Inc
Original Assignee
Baxter International Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Grant date

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0111Aseptic insertion devices
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06Body-piercing guide needles or the like

Description

Aug. 15, 1967 1|. F. WALDMAN, JR

INDWELLING CATHETER UNIT Fiied Dec.

ITV

INVENTOR. LEONARD F WALDMAN JR.

ATTORNEY United States Patent 3,335,723 INDWELLING CATHETER UNIT Leonard F. Waldman, Jr., Niles, Ill., assignor to Baxter Laboratories, Inc., Morton Grove, Ill., a corporation of Delaware Filed Dec. 2, 1964, Ser. No. 415,368 1 Claim. (Cl. 128214.4)

The present invention relates to an apparatus for the intravenous administration of fluids. More particularly, it relates to an improved indwelling catheter.

Quite often it is essential, especially in surgical cases, that large volumes of fluids be administered to a patient over a relatively long period of time. Until recently it has been necessary in such instances to place the hollow metal needle of a fluid administration set in the vein of the patient, administer a unit of fluid, leave the needle in the vein, and then at a later time administer additional units of fluid through the same needle; or alternatively to withdraw the needle after the administration of each unit of fluid and make a new venipuncture with a new needle at a new site when it is desired to administer another unit of fluid. Both of these alternatives present obvious disadvantages. To overcome these disadvantages the indwelling catheter was devised. The indwelling catheter is an inert flexible plastic tube which is placed into the vein of a patient and allowed to remain there for the entire period of fluid administration. Since it is flexible and inert the indwelling catheter does not cause the irritation or trauma which normally results when a metal needle is allowed to remain in a vein for long periods of time.

Two types of indwelling catheter units are currently available commercially. The first type is one in which the indwelling catheter is disposed as an external sleeve about a piercing device such as a stylet or a needle. The second type of unit is one in which the indwelling catheter is disposed within or introduced into the vein of a patient by threading it through the lumen of a needle and into the vein. The two types of units are exemplified by the devices of US. Patents Nos. 3,094,122 and 3,017,884, respectively.

The first type of unit oflers a substantial advantage in that, if perchance, the needle is not properly placed within a vein the unit can be flushed and another attempt made to locate it properly. The second type of unit also provides a substantial advantage in that it provides, more readily, for the protection and sterility of the indwelling catheter.

The present invention while it relates to a unit of the second type, that is, one in which the catheter is threaded through the lumen of the needle into the vein of the patient, nevertheless, possesses the aforementioned advantages of both types of indwelling catheter units.

It is in general the object of the present invention to provide a superior and improved indwelling catheter unit.

This and other objects will be apparent to those skilled in the art from the specification and the drawings in which:

FIGURE 1 is an elevational view of the apparatus.

FIGURE 2 is an elevational view of the apparatus with the plastic cannula partly advanced and the protector tip removed.

FIGURE 3 is an enlarged sectional view of the apparatus connected to a conventional fluid administration set.

In FIGURE 1 it is seen that the apparatus of the invention, which is generally referred to by the numeral 10, comprises a hollow needle 11, which is provided with a hub 12 and a pointed end 13. Attached to the hub 12 at the end distal the needle is an outwardly extending, relatively rigid, elongated, hollow, cylindrical, take-up tube 3,335,723 Patented Aug. 15, 1967 14. Extending over the length of the needle and protecting the pointed end 13 is a protective tip member 15 which is attached to the hub 12 at one end and is provided with a cotton plug 16 at the other end.

The free end of the flexible plastic indwelling catheter 17 extends into the lumen of the needle 1.1 and through the hollow, cylindrical member 14. The other end of the catheter 17 is affixed in communicating relationship to the hub of a female luer adapter 18. To protect it from contamination the open end of the luer adapter 18 is closed with a rubber stopper 19.

A flexible, collapsible, non-extensible, lay flat, protective sleeve 20 of plastic material, such as polyethylene or the like, is fastened in a protective manner about the catheter 17 and is aflixed at one end to the hub 12 of the needle 11 and at the other end to the hub of the female luer adapter 18. The sleeve 20 also encompasses and protects the entire length of the hollow member 14. The ends of the sleeve 20 are attached to the hubs [by suitable attachment means 21a and 21b, e.g., rubber bands, plastic tape, or the like.

The apparatus :as it appears in FIGURE 1 is completely assembled and can be sterilized without structural change by conventional gas or radiation sterilization techniques.

In use, the catheter unit is connected to an administration set 22 via the female luer adapter 18 and primed. A control clamp (not shown) on the set is closed, and the protector tip 15 is removed from the needle. A venipuncture is made and the advancement of the catheter -is started by gathering the sleeve 20 on the take-up tube in an accordion-like fashion (FIGURE 2). To determine whether a successful catheter placement has been made, the flashback device 23 (FIGURE 3) on the administration set is compressed and released. If the catheter is properly placed in a vein blood will appear in the catheter.

To completely thread the catheter into the vein the sleeve 20 is further gathered on the take-up tube until the distal end of the luer adapter 18 is engaged into the proximal end of the take-up tube 14. (Seen only in FIG- URE 3,) The needle is then retracted from the venipuncture site to a non-flexing anatomical surface where the needle point is covered by a needle guard or tape and the catheter hub, take-up tube, and needle combination are taped to said surface. The site of the venipuncture, and catheter entrance, is then covered by a bandage and infusion is started.

Alternatively, if so desired, the flow of fluid through the catheter may be commenced immediately after the venipuncture is made and while the catheter is being advanced.

The device .of the present invention is unique in that it allows for two methods of introduction of catheter through the needle lumen into the Vein. The first method allows for advancement of the catheter by gathering the sleeve 20 onto the take-up tube. As the sleeve is gathered on the take-up tube the catheter is automatically advanced into the vein. The second method of advancing the catheter allows for an actual threading of the catheter through the needle lumen by manipulation of the catheter itself through the sleeve 20. As the catheter is threaded into the vein, the excess sleeve material is gathered onto the take-up tube in an accordion fashion.

In addition to the advantages realized from the alternate methods of advancing the catheter, the apparatus of the present invention provides additional advantages for it is provided with a female luer adapter which is readily accessible and can be connected to an intravenous administration set prior to making a venipuncture. This feature permits the priming of the catheter prior to venipuncture and when used with the flashback feature on the administration set it provides a non-messy way of determining whether the catheter is placed in the vein.

The apparatus of the present invention, in addition to providing the forementioned advantages, is inexpensive and readily disposable. In its preferred embodiment the hub of the needle, the female luer adapter, the take-up tube, the protector tip, the protective sleeve and the catheter are made of suitable plastic resinous materials such as polyethylene, polypropylene, nylon and the like. The exact size and proportions of the various elements, such as the size of the needle and the length of the catheter, will, of course, be determined largely by the desires of the ultimate user, i.e. the physician. It will be readily understood, however, that in order for the device to function in the manner described the catheter must readily fit within the lumen of the needle and bore of the take-up tube and the plastic sleeve must be of sufiiciently large diameter to allow it to be gathered in accordian-like fashion on the takeup tube. The length of the take-up tube will, of course, be controlled by the length of the catheter and the sleeve, i.e., it must be long enough to accommodate the sleeve in an accordion-like fashion.

From the foregoing, it will be apparent that a number of changes and modifications can be made without departing from the spirit and scope of the invention.

What I claim is:

In an indwelling catheter unit, a hollow needle having a point at one end and a hub at the other end, a rigid plastic elongated, hollow cylindrical take-up tube attached to said hub, a flexible plastic catheter extending through said needle and take-up tube and mounted movably for projection of one end of the catheter past the end of the needle, a female luer adapter at the other end of the catheter for attachment toa source of parenteral fluid, a flexible, collapsible lay fiat plastic sleeve attached at one end to said female luer adapter and the other end to the hub of said needle, said female luer adapter having a proximal end which will fit within and engage the distal end of take-up tube in a leakproof manner when the catheter is fully advanced, and said take-up tube being of sufficient length to accommodate the full collapsed length of said sleeve in an accordion-like manner.

References Cited UNITED STATES PATENTS 3,055,361 9/1962 Ballard 128-2l4.4 3,185,151 5/1965 Czorny 128-2l4.4 3,185,152 5/1965 Ring 1282l4.4 3,262,448 7/1966 Ring et al. 128--214.4

RICHARD A. GAUDET, Primary Examiner.

DALTON L. TRULUCK, Examiner.

US3335723A 1964-12-02 1964-12-02 Indwelling catheter unit Expired - Lifetime US3335723A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US3335723A US3335723A (en) 1964-12-02 1964-12-02 Indwelling catheter unit

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US3335723A US3335723A (en) 1964-12-02 1964-12-02 Indwelling catheter unit
GB4336165A GB1124599A (en) 1964-12-02 1965-10-13 Indwelling catheter
BE671730A BE671730A (en) 1964-12-02 1965-11-03
DK607865A DK114717B (en) 1964-12-02 1965-11-26 Infuser.
FR40062A FR1459467A (en) 1964-12-02 1965-11-29 Catheter for prolonged injections
DE19651491647 DE1491647A1 (en) 1964-12-02 1965-12-01 venous catheter

Publications (1)

Publication Number Publication Date
US3335723A true US3335723A (en) 1967-08-15

Family

ID=23645410

Family Applications (1)

Application Number Title Priority Date Filing Date
US3335723A Expired - Lifetime US3335723A (en) 1964-12-02 1964-12-02 Indwelling catheter unit

Country Status (6)

Country Link
US (1) US3335723A (en)
BE (1) BE671730A (en)
DE (1) DE1491647A1 (en)
DK (1) DK114717B (en)
FR (1) FR1459467A (en)
GB (1) GB1124599A (en)

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474786A (en) * 1968-12-04 1969-10-28 Spademan Richard George Catheter adapted for fluid connection prior to insertion
US3474674A (en) * 1966-02-17 1969-10-28 Precision Sampling Corp Liquid injection apparatus
US3825001A (en) * 1972-12-05 1974-07-23 Johnson & Johnson Catheter placement unit
US3920013A (en) * 1975-01-06 1975-11-18 Jason H Bodzin Subclavian vena puncture devices
US3991762A (en) * 1974-09-30 1976-11-16 Radford F Richard Aspirating device for patient ventilation apparatus
US4327735A (en) * 1980-10-22 1982-05-04 Cordis Corporation Catheter assembly
US4327723A (en) * 1980-05-13 1982-05-04 Arrow International, Inc. Catheter shield
US4359052A (en) * 1976-01-26 1982-11-16 Concept Inc. Removable tip cautery
US4515592A (en) * 1980-05-13 1985-05-07 Arrow International, Inc. Catheter shield
US4810194A (en) * 1987-11-04 1989-03-07 Snedden John E Disposable antiseptic dental shield
US4850350A (en) * 1986-06-23 1989-07-25 Sheridan Catheter Corp. Closed system combined suction and ventilation devices
US4850974A (en) * 1984-10-11 1989-07-25 Baxter International Inc. Dispenser and method for an elongated flexible member
US4957489A (en) * 1988-10-19 1990-09-18 Critikon, Inc. Through the needle catheter insertion device and technique
US4957488A (en) * 1988-10-19 1990-09-18 Critikon, Inc. Through the needle catheter device
US4967743A (en) * 1987-03-11 1990-11-06 Ballard Medical Products Neonatal closed system for involuntary aspiration and ventilation, and method
US4994040A (en) * 1988-10-19 1991-02-19 Critikon, Inc. Through the needle catheter insertion device and technique
US5045065A (en) * 1989-03-20 1991-09-03 Raulerson J Daniel Catheter introduction syringe
US5065754A (en) * 1990-06-06 1991-11-19 Ballard Medical Products Aspirating catheter tube inserter
US5107829A (en) * 1987-03-11 1992-04-28 Ballard Medical Products Neonatal closed system for involuntary aspiration and ventilation, and method
US5133345A (en) * 1987-03-11 1992-07-28 Ballard Medical Products Neonatal closed system for involuntary aspiration and ventilation, and method
US5149326A (en) * 1990-09-21 1992-09-22 Baxter International Inc. Adjustable catheter contamination shield
US5215522A (en) * 1984-07-23 1993-06-01 Ballard Medical Products Single use medical aspirating device and method
US5228851A (en) * 1991-10-01 1993-07-20 Burton Clarence E Single-use disposable prophylactic elastic sleeve
US5277177A (en) * 1984-07-23 1994-01-11 Ballard Medical Products Single use medical aspirating device and method
US5355876A (en) * 1992-05-06 1994-10-18 Superior Healthcare Group, Inc. Patient ventilating apparatus with modular components
US5645048A (en) * 1992-05-06 1997-07-08 The Kendall Company Patient ventilating apparatus with modular components
US5694922A (en) * 1994-05-18 1997-12-09 Ballard Medical Products Swivel tube connections with hermetic seals
US5715815A (en) * 1995-03-28 1998-02-10 Ballard Medical Products, Inc. Sheath sterility preservation filter and seal for suction catheters
US5735271A (en) * 1994-05-18 1998-04-07 Ballard Medical Products Multiple access adaptors for monitoring, sampling, medicating, aspirating, and ventilating the respiratory tract of a patient
US6494203B1 (en) 1994-08-19 2002-12-17 Ballard Medical Products Medical aspirating/ventilating closed system improvements and methods
US20030018293A1 (en) * 2001-06-29 2003-01-23 Allan Tanghoj Catheter device
US6612304B1 (en) 2000-10-05 2003-09-02 Kimberly-Clark Worldwide, Inc. Respiratory care multiple access port assembly and adapter
US20040158231A1 (en) * 2001-06-29 2004-08-12 Allan Tanghoj Catheter device
US20040163980A1 (en) * 2001-06-29 2004-08-26 Allan Tanghoj Catheter assembly valve system
US20060025753A1 (en) * 2004-08-02 2006-02-02 Kubalak Thomas P Urinary catheter assembly
US20060229573A1 (en) * 2005-04-08 2006-10-12 Mckinley Medical L.L.L.P. Adjustable infusion catheter
US20080319423A1 (en) * 2001-09-24 2008-12-25 Coloplast A/S (Reel 012442, Frame 0712) Urinary catheter assembly allowing for non-contaminated insertion of the catheter into a urinary canal
US20120283775A1 (en) * 2011-05-06 2012-11-08 Edward H Cully Echogenic Sleeve
US20140005613A9 (en) * 2010-07-26 2014-01-02 Steerable Instruments Bvba Capillary tube assembly
US9585784B2 (en) 2011-08-29 2017-03-07 Coloplast A/S Catheter activation by handle removal

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4008391C1 (en) * 1990-03-16 1991-10-17 Vygon Gmbh & Co Kg, 5100 Aachen, De

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3055361A (en) * 1960-04-22 1962-09-25 Deseret Pharmaceutical Company Intravenous catheters
US3185151A (en) * 1962-06-19 1965-05-25 Sorenson Res Corp Catheter placement unit
US3185152A (en) * 1962-06-19 1965-05-25 Sorenson Res Corp Intravenous catheter placement unit and method of use
US3262448A (en) * 1963-11-06 1966-07-26 Sorenson Res Corp Intravenous catheter placement unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3055361A (en) * 1960-04-22 1962-09-25 Deseret Pharmaceutical Company Intravenous catheters
US3185151A (en) * 1962-06-19 1965-05-25 Sorenson Res Corp Catheter placement unit
US3185152A (en) * 1962-06-19 1965-05-25 Sorenson Res Corp Intravenous catheter placement unit and method of use
US3262448A (en) * 1963-11-06 1966-07-26 Sorenson Res Corp Intravenous catheter placement unit

Cited By (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474674A (en) * 1966-02-17 1969-10-28 Precision Sampling Corp Liquid injection apparatus
US3474786A (en) * 1968-12-04 1969-10-28 Spademan Richard George Catheter adapted for fluid connection prior to insertion
US3825001A (en) * 1972-12-05 1974-07-23 Johnson & Johnson Catheter placement unit
US3991762A (en) * 1974-09-30 1976-11-16 Radford F Richard Aspirating device for patient ventilation apparatus
US3920013A (en) * 1975-01-06 1975-11-18 Jason H Bodzin Subclavian vena puncture devices
US4359052A (en) * 1976-01-26 1982-11-16 Concept Inc. Removable tip cautery
US4515592A (en) * 1980-05-13 1985-05-07 Arrow International, Inc. Catheter shield
US4327723A (en) * 1980-05-13 1982-05-04 Arrow International, Inc. Catheter shield
US4327735A (en) * 1980-10-22 1982-05-04 Cordis Corporation Catheter assembly
US5611336A (en) * 1984-07-23 1997-03-18 Ballard Medical Products, Inc. Single use medical aspirating device and method
US5277177A (en) * 1984-07-23 1994-01-11 Ballard Medical Products Single use medical aspirating device and method
US5215522A (en) * 1984-07-23 1993-06-01 Ballard Medical Products Single use medical aspirating device and method
US4850974A (en) * 1984-10-11 1989-07-25 Baxter International Inc. Dispenser and method for an elongated flexible member
US4850350A (en) * 1986-06-23 1989-07-25 Sheridan Catheter Corp. Closed system combined suction and ventilation devices
US5107829A (en) * 1987-03-11 1992-04-28 Ballard Medical Products Neonatal closed system for involuntary aspiration and ventilation, and method
US5133345A (en) * 1987-03-11 1992-07-28 Ballard Medical Products Neonatal closed system for involuntary aspiration and ventilation, and method
US4967743A (en) * 1987-03-11 1990-11-06 Ballard Medical Products Neonatal closed system for involuntary aspiration and ventilation, and method
US4810194A (en) * 1987-11-04 1989-03-07 Snedden John E Disposable antiseptic dental shield
US4957489A (en) * 1988-10-19 1990-09-18 Critikon, Inc. Through the needle catheter insertion device and technique
US4957488A (en) * 1988-10-19 1990-09-18 Critikon, Inc. Through the needle catheter device
US4994040A (en) * 1988-10-19 1991-02-19 Critikon, Inc. Through the needle catheter insertion device and technique
US5045065A (en) * 1989-03-20 1991-09-03 Raulerson J Daniel Catheter introduction syringe
US5065754A (en) * 1990-06-06 1991-11-19 Ballard Medical Products Aspirating catheter tube inserter
US5149326A (en) * 1990-09-21 1992-09-22 Baxter International Inc. Adjustable catheter contamination shield
US5228851A (en) * 1991-10-01 1993-07-20 Burton Clarence E Single-use disposable prophylactic elastic sleeve
US5355876A (en) * 1992-05-06 1994-10-18 Superior Healthcare Group, Inc. Patient ventilating apparatus with modular components
US5645048A (en) * 1992-05-06 1997-07-08 The Kendall Company Patient ventilating apparatus with modular components
US5735271A (en) * 1994-05-18 1998-04-07 Ballard Medical Products Multiple access adaptors for monitoring, sampling, medicating, aspirating, and ventilating the respiratory tract of a patient
US5694922A (en) * 1994-05-18 1997-12-09 Ballard Medical Products Swivel tube connections with hermetic seals
US6494203B1 (en) 1994-08-19 2002-12-17 Ballard Medical Products Medical aspirating/ventilating closed system improvements and methods
US5715815A (en) * 1995-03-28 1998-02-10 Ballard Medical Products, Inc. Sheath sterility preservation filter and seal for suction catheters
US6612304B1 (en) 2000-10-05 2003-09-02 Kimberly-Clark Worldwide, Inc. Respiratory care multiple access port assembly and adapter
US8002766B2 (en) 2001-06-29 2011-08-23 Coloplast A/S Catheter assembly
US20040158231A1 (en) * 2001-06-29 2004-08-12 Allan Tanghoj Catheter device
US20040163980A1 (en) * 2001-06-29 2004-08-26 Allan Tanghoj Catheter assembly valve system
US8986286B2 (en) * 2001-06-29 2015-03-24 Coloplast A/S Catheter device
US8679092B2 (en) 2001-06-29 2014-03-25 Coloplast A/S Catheter assembly
US8066693B2 (en) 2001-06-29 2011-11-29 Coloplast A/S Catheter device
US20080027414A1 (en) * 2001-06-29 2008-01-31 Coloplast A/S Method of producing a catheter and a catheter
US20110213343A1 (en) * 2001-06-29 2011-09-01 Coloplast A/S Catheter assembly
US7517343B2 (en) 2001-06-29 2009-04-14 Coloplast A/S Catheter assembly
US20090149837A1 (en) * 2001-06-29 2009-06-11 Coloplast A/S Catheter Assembly
US20030018293A1 (en) * 2001-06-29 2003-01-23 Allan Tanghoj Catheter device
US20100204682A1 (en) * 2001-06-29 2010-08-12 Coloplast A/S Catheter device
US7682353B2 (en) * 2001-06-29 2010-03-23 Coloplast A/S Catheter device
US7922712B2 (en) 2001-09-24 2011-04-12 Coloplast A/S Urinary catheter assembly allowing for non-contaminated insertion of the catheter into a urinary canal
US20080319423A1 (en) * 2001-09-24 2008-12-25 Coloplast A/S (Reel 012442, Frame 0712) Urinary catheter assembly allowing for non-contaminated insertion of the catheter into a urinary canal
US7789873B2 (en) * 2004-08-02 2010-09-07 Coloplast A/S Urinary catheter assembly
WO2006017439A3 (en) * 2004-08-02 2007-03-15 Mentor Corp Urinary catheter assembly
US20060025753A1 (en) * 2004-08-02 2006-02-02 Kubalak Thomas P Urinary catheter assembly
US20060229573A1 (en) * 2005-04-08 2006-10-12 Mckinley Medical L.L.L.P. Adjustable infusion catheter
US20140005613A9 (en) * 2010-07-26 2014-01-02 Steerable Instruments Bvba Capillary tube assembly
US8882716B2 (en) * 2010-07-26 2014-11-11 Steerable Instruments Bvba Capillary tube assembly
US20120283775A1 (en) * 2011-05-06 2012-11-08 Edward H Cully Echogenic Sleeve
US9585784B2 (en) 2011-08-29 2017-03-07 Coloplast A/S Catheter activation by handle removal

Also Published As

Publication number Publication date Type
BE671730A (en) 1966-03-01 grant
DK114717B (en) 1969-07-28 grant
DE1491647A1 (en) 1969-04-24 application
FR1459467A (en) 1966-11-18 grant
GB1124599A (en) 1968-08-21 application

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