US3793810A - Defoaming device for medical humidifier - Google Patents
Defoaming device for medical humidifier Download PDFInfo
- Publication number
- US3793810A US3793810A US00264350A US3793810DA US3793810A US 3793810 A US3793810 A US 3793810A US 00264350 A US00264350 A US 00264350A US 3793810D A US3793810D A US 3793810DA US 3793810 A US3793810 A US 3793810A
- Authority
- US
- United States
- Prior art keywords
- bottle
- liquid
- housing
- defoaming
- partition
- 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
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
- A61M16/16—Devices to humidify the respiration air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/50—Movable or transportable mixing devices or plants
- B01F33/501—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use
- B01F33/5011—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use portable during use, e.g. hand-held
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S261/00—Gas and liquid contact apparatus
- Y10S261/26—Foam
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S261/00—Gas and liquid contact apparatus
- Y10S261/65—Vaporizers
Definitions
- the defoamer has a dual chambered partitioned housing with a separate window opening into each chamber.
- One chamber picks up foam and liquid drops and recycles them to a liquid reservoir in a supply bottle.
- the other chamber collects the defoamed humidified gas that is free of liquid drops and supplies it to a patients breathing tube.
- the defoaming device fits inside the supply bottle and forms a connecting link between a gas-liquid mixing column in the bottle and an outlet port of the bottle.
- inhalation therapy has been used very extensively for treatment of emphysema and other lung and respiratory diseases as well as postoperative treatment and cardiac patient care.
- a breathable gas such as air or oxygen
- This humidified gas is supplied to a mask, nasal cannula, or tent, where it is breathed by the patient.
- a conventional medical humidifier system includes a dry gas source such as a portable oxygen tank or central oxygen supply system of a hospital, coupled with a container of the humidifying liquid. l-Iumidification is accomplished by atomizing the liquid into the gas or by bubbling the gas through the liquid.
- SUMMARY OF THE INVENTION 1 have overcome the problems of foaming and liquid drop formation in previous medical humidifiers for inhalation therapy.
- my invention I have provided a tubular dual-chambered defoaming housing that fits inside a liquid supply bottle and connects a gas-liquid mixing column with an outlet port of the supply bottle.
- a first chamber at a lower end of the defoaming housing communicates with the gas-liquid mixing column. This first chamber picks up humidified gas with entrained foam and liquid drops from the mixing column.
- the foam and liquid drops hit against a transverse partition between the two chambers, exit through a first window of the defoaming housing, and return to a liquid reservoir in the liquid supply bottle for recycling.
- Humidified gas that exits through the defoamer housings first window is collected in an upper portion of the liquid supply bottle.
- the humidified gas is picked up through a second window of the housing where the gas enters a second chamber adjacent an upper end of the housing.
- This second chamber also communicates with an outlet port of the bottle through which the humidified gas, separated from the foam and liquid drops, is fed to a patients breathing tube.
- FIG. 1 is a front elevational view partially in section showing the defoaming housing connecting a gas-liquid mixing column with an outlet port of the bottle;
- FIG. 2 is a front elevational view of an adapter for connecting the outlet port of the bottle with a gas supply tube leading to a patient;
- FIG. 3 is an enlarged sectional view of the defoaming housing before it is connected to the outlet port of the bottle and the gas-liquid mixing column;
- FIG. 4 is a top plan view taken along line 4-4 of FIG. 3;
- FIG. 5 is a bottom plan view taken along line 5-5 of FIG. 3;
- FIG. 6 is an enlarged fragmentary view, partially in section, showing the interrelationship between the defoaming housing, the gas-liquid mixing column, and the outlet port adapter on the bottle.
- FIG. 1 shows the liquid supply bottle 1 containing a liquid 2.
- a neck 3 At a top of bottle 1 is a neck 3 with a passage that is closed off by an outer cap 4 permanently secured to the bottle neck.
- Cap 4 has an outlet passage 5 defined by a tubular sleeve 6.
- the outer end of sleve 6 is sealed with a peel-off film 7.
- the bottle shown in FIG. 1 is thus a closed system for liquid 2 when it is supplied to a hospital.
- a gas-liquid mixing column 8 Within the bottle 1 is a gas-liquid mixing column 8. This mixing column 8 is submerged in liquid 2 and includes a series of mixing compartments represented by 9 and 10. The details of the mixing column are brought out in my copending application entitled Mixing Column for a Medical Humidifier and Method of Humidifying Inhalable Gases filed June 19, 1972, Ser. No. 264,314.
- the submerged multi-chambered mixing column 8 has an upper end with a tubular outer wall 11 and a central dry gas tube 12. Fitting directly to the upper end of humidifier column 8 is a defoaming housing 13 that has an upper end 14 permanently attached to the bottom or bottle cap. This defoaming housing supportingly suspends the mixing column while submerged in liquid 2 as shown in FIG. 1.
- FIG. 2 shows a separate adapter 15 for joining the outlet passage 5 of the cap 4 with a dry gas supply source and a conduit leading to a patients tent, mask, nasal cannula, etc.
- dry gas is used to distinguish from a humidified gas produced by the humidifier and exits through adapter 15.
- This adapter is supplied with the bottle and is inserted into passage 5 after a nurse, inhalation therapist, or physician tears off film 7 immediately before attaching the adapter to the humidifier liquid supply bottle.
- the defoaming housing separated from the gas-liquid mixing column and the cap of the bottle is shown in FIG. 4.
- the defoaming housing includes an outer tubular wall 20 that has an external flange 21 at an upper end. This flange is of a configuration to mate with and permanently seal to either the cap 4 or a lip of the bottle.
- a spring flange 22 At a lower end of tubular wall 20 is a spring flange 22 of thinner wall construction than the remaining portion of wall 20.
- Spring flange 22 includes an annular snap rib 23 on an internal surface and forms a snap fit with a top portion of a gas-liquid mixing column.
- a transverse partition 24 Between an upper and lower end of tubular outer wall 20 is a transverse partition 24. This partition has a centrally located passage 25 extending therethrough. Directly surrounding passage 25 is a dry gas tube 26 that extends above partition 24 to an upper end 27 and below partition 24 to a lower end 28. Except for passage 25 the partition 24 is imperforate. Thus partition 24 forms a separating barrier between a first chamber 30 below partition 24 and a second chamber 31 above partition 24.
- the tubular outer wall 20 includes a window or aperture 32 below partition 24. It also includes a vertically elongated window or aperture 33 above partition 24. These windows 32 and 33 are rotationally offset about the circumference of the outer tubular wall which is generally cylindrical in form. The reason for this is so that foam and liquid drops collected in chamber 30 and sprayed out through window 32 have a reduced chance of being picked up through window 33 of chamber 31 as humidified gases are collected.
- the dry gas tube 26 is preferably located along a common longitudinal axis with the cylindrical outer housing wall 20.
- the defoaming housing to the gas-liquid mixing column and securing it to cap 4 no rotational orientation about the longitudinal axis of the defoaming housing is required.
- the defoaming housing is shown joining to cap 4, adapter and humidifier column 8.
- the tubular defoaming housing fits inside the cap where it is permanently sealed either directly to the cap or to the bottle neck.
- the housing extends downwardly to its lower end where rib 23 engages with groove 24 in an upstanding flange 40 of the gas-liquid mixing column.
- This relationship creates a chamber 30 that is defined by the tubular wall 20, partition 24, dry gas tube 26, and an upper sieve plate 41 of the gas-liquid mixing column.
- the humidified gas with foam and liquid drops from a mixing chamber 42 of mixing column 8 proceeds upwardly through apertures and sieve plate 41 and collects in chamber 30.
- the humidifier gas of chamber 30 exits through window 32 along with foam and liquid drops.
- the humidified gas is collected in an upper portion of the liquid supply bottle.
- the foam and liquid drops as shown schematically are returned to the reservoir of liquid 2 inside the bottle. Thus the foam and liquid drops are recycled through the gas-liquid mixing column.
- the humidified gas thus separated from the foam and liquid drops is collected in an upper portion of the bottle and passes through window 33 and where it is collected in chamber 31.
- the humidified gas then proceeds upwardly through an annular passage 50 in adapter 15, and thereafter out through a passage 51 in a tubular side arm 52 of the adapter.
- Tubular side arm 52 is normally connected to a long flexible plastic tube leading to the patients tent, mask, nasal cannula, etc., where the humidified gas is breathed by the patient.
- the adapter 15 has a center dry gas tube 55 that mates with and supplies dry gas tube 26 of the defoaming housing.
- the adapter 15 and its interconnection with the bottle and cap 4 is explained in more detail in my copending invention entitled Port System for Medical Humidifier Container filed June 19, 1972, Ser. No. 264,315.
- the defoaming housing that forms an important connecting link between the outlet port system of the liquid supply bottle and the gas-liquid mixing chamber is preferably injection-molded as an integral one-piece thermoplastic part.
- polypropylene thermoplastic works very well in the defoaming housing construction.
- This injection molding technique for the one-piece defoaming housing construction makes it sufiiciently inexpensive so it can be economically discarded after a single use on a single patient. This greatly reduces the chance of cross-contamination between patients.
- a medical humidifier for inhalation therapy including a liquid-containing bottle with an inlet port and an outlet port, and a gas-liquid mixing column within the bottle, the improvement comprising: a defoaming housing connecting the gas-liquid mixing column with the outlet port, said defoaming housing having a first chamber communicating with the gas-liquid mixing column and a second chamber communicating with the outlet port of the bottle; both of said chambers including windows communicating with an interior of the bottle, whereby liquid drops and liquid foam from the mixing column are expelled through the first chamber window for return to a liquid reservoir in the bottle for recycling, and humidified gas is collected through the second chamber window for transfer through the bottles exit port to a patient.
- transverse partition includes a dry gas passage therethrough for communicating with the humidifier mixing column.
- the bottle has a closure and the inlet and outlet ports of the bottle include two concentrically disposed tubes extending through the closure with the inner tube connecting with the dry gas source, and said outer tube is spaced outwardly from the inner tube to provide an annular outlet passage between the two tubes, said annular outlet passage having an opening in the second chamber.
- defoaming housing includes a tubular outer wall with retention means adjacent one end for coupling with the humidifier column.
- a defoaming housing including a tubular outer wall with ends; a dry gas tube that is smaller than and fits within the outer wall; and an annular transverse partition wall concentrically connecting the dry gas tube and the tubular outer wall; said housing defining a foam return chamber on one side of the partition and a humidified gas collection chamber on an opposite side of the partition; and each of said chambers have at least one window through the outer tubular wall for communicating with an interior of a medical liquid supply bottle when said defoaming chamber is disposed within said bottle.
- defoaming chamber has means adjacent its opposite ends for connecting with a gas-liquid mixing column and a port system of a medical liquid supply bottle.
- combination as set forth in claim 11 wherein the combination also includes a medical liquid supply bottle; liquid within said bottle; and the defoamer housing is permanently secured to the bottle interiorly of said bottle.
- the medical liquid includes a methyl paraben and propyl paraben which cause a foaming action when a liquid is subjected to bubbling gas therethrough.
- a defoaming housing connecting the bottle outlet with the mixing means; said defoaming housing including a transverse partition separating the housing into two chambers which communicate respectively with the bottle outlet and mixing means, whereby the partition blocks passage of fluids from the mixing means to the bottle outlet; and said defoaming housing includes windows through the housing for recycling liquid drops and foam to a liquid reservoir within the bottle and for pro viding an outlet passage means for humidified air from the bottles interior.
- a bottle having a neck opening thereon; a closure closing off this neck opening, said closure being permanently bonded to the bottle, and said closure having a port therethrough; an adapter with an outlet tube permanently secured in this closure port and having a passage through said outlet tube, an inlet tube of the adapter concentrically disposed within said outlet tube and defining an annular space between the inlet and outlet tubes, said inlet and outlet tubes forming an integral part of the adapter which is permanently secured to the closure; a multi-chambered mixing column disposed within said bottle; and a tubular defoaming housing have a lower end connected to said mixing column and having an upper end permanently secured to the bottle adjacent the closure; a transverse partition between ends of the defoaming housing, said partition separating the housing into upper and lower chambers; a dry gas tube connected with the partition to form a passage extending through said partition, said dry gas tube being smaller than and located within said tubular housing; said defoaming housing including a window
- thermoplastic tube are integrally formed of a thermoplastic material.
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heart & Thoracic Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Emergency Medicine (AREA)
- Hematology (AREA)
- Pulmonology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
- External Artificial Organs (AREA)
- Nozzles (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US26435072A | 1972-06-19 | 1972-06-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3793810A true US3793810A (en) | 1974-02-26 |
Family
ID=23005656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00264350A Expired - Lifetime US3793810A (en) | 1972-06-19 | 1972-06-19 | Defoaming device for medical humidifier |
Country Status (13)
Country | Link |
---|---|
US (1) | US3793810A (he) |
JP (1) | JPS4951793A (he) |
AU (1) | AU5348873A (he) |
BE (1) | BE797607A (he) |
CA (1) | CA986848A (he) |
CH (1) | CH566143A5 (he) |
DE (1) | DE2329505C3 (he) |
ES (1) | ES413666A1 (he) |
FR (1) | FR2189105B1 (he) |
GB (1) | GB1437134A (he) |
IT (1) | IT980079B (he) |
PH (1) | PH10059A (he) |
SE (1) | SE402055B (he) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4028444A (en) * | 1974-03-25 | 1977-06-07 | Chemetron Corporation | Humidifier and automatic control system therefor |
US4098853A (en) * | 1974-03-25 | 1978-07-04 | Chemetron Corporation | Humidifier and automatic control system therefor |
US4140735A (en) * | 1977-08-15 | 1979-02-20 | J. C. Schumacher Co. | Process and apparatus for bubbling gas through a high purity liquid |
US20040232065A1 (en) * | 2003-05-23 | 2004-11-25 | Tanner John D. | Water treatment devices and cartridges therefor |
US20050265903A1 (en) * | 2004-05-28 | 2005-12-01 | Julian Ross | Apparatus and delivery of medically pure oxygen |
WO2007008194A3 (en) * | 2005-07-07 | 2007-08-02 | Oxysure Systems Inc | Apparatus and delivery of medically pure oxygen |
US20090008321A1 (en) * | 2003-09-18 | 2009-01-08 | Tanner John D | Water treatment devices and cartridges therefor |
CN109708230A (zh) * | 2018-12-19 | 2019-05-03 | 李高勇 | 一种气体湿化装置 |
US11052217B2 (en) * | 2017-05-17 | 2021-07-06 | ResMed Pty Ltd | Humidifier |
US11054183B2 (en) * | 2017-05-08 | 2021-07-06 | Cenorin, Llc | Medical implement drying apparatus |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60113051U (ja) * | 1984-01-10 | 1985-07-31 | 河口湖精密株式会社 | 麻酔用流量計の加湿器 |
JP2726240B2 (ja) * | 1986-03-20 | 1998-03-11 | 帝人株式会社 | 酸素富化気体供給装置 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1920437A (en) * | 1930-04-11 | 1933-08-01 | Donald A Sillers | Separating device |
US2297586A (en) * | 1940-07-03 | 1942-09-29 | Bethlehem Steel Corp | Aerating machine |
US3155472A (en) * | 1959-07-27 | 1964-11-03 | Simpson Herbert Corp | Gas scrubber system |
US3262721A (en) * | 1964-05-01 | 1966-07-26 | Nelson Mfg Co Inc L R | Snap action hose fitting |
US3524631A (en) * | 1966-11-22 | 1970-08-18 | Ernest Mare | Means for carrying out gas scrubbing operations |
US3572660A (en) * | 1967-08-04 | 1971-03-30 | Becton Dickinson Co | Device for dispensing inhalable fluids |
US3610478A (en) * | 1969-04-28 | 1971-10-05 | Mack S Johnston | Tapping device for beer kegs and the like |
US3648440A (en) * | 1969-09-02 | 1972-03-14 | Carborundum Co | Wet scrubber system |
-
1972
- 1972-06-19 US US00264350A patent/US3793810A/en not_active Expired - Lifetime
-
1973
- 1973-03-14 CA CA166,079A patent/CA986848A/en not_active Expired
- 1973-03-19 AU AU53488/73A patent/AU5348873A/en not_active Expired
- 1973-03-29 SE SE7304482A patent/SE402055B/xx unknown
- 1973-03-30 BE BE129510A patent/BE797607A/xx unknown
- 1973-03-30 IT IT49167/73A patent/IT980079B/it active
- 1973-04-04 FR FR7312064A patent/FR2189105B1/fr not_active Expired
- 1973-04-13 ES ES413666A patent/ES413666A1/es not_active Expired
- 1973-05-08 JP JP48050393A patent/JPS4951793A/ja active Pending
- 1973-05-22 CH CH726573A patent/CH566143A5/xx not_active IP Right Cessation
- 1973-06-07 PH PH14705A patent/PH10059A/en unknown
- 1973-06-08 GB GB2744873A patent/GB1437134A/en not_active Expired
- 1973-06-08 DE DE2329505A patent/DE2329505C3/de not_active Expired
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1920437A (en) * | 1930-04-11 | 1933-08-01 | Donald A Sillers | Separating device |
US2297586A (en) * | 1940-07-03 | 1942-09-29 | Bethlehem Steel Corp | Aerating machine |
US3155472A (en) * | 1959-07-27 | 1964-11-03 | Simpson Herbert Corp | Gas scrubber system |
US3262721A (en) * | 1964-05-01 | 1966-07-26 | Nelson Mfg Co Inc L R | Snap action hose fitting |
US3524631A (en) * | 1966-11-22 | 1970-08-18 | Ernest Mare | Means for carrying out gas scrubbing operations |
US3572660A (en) * | 1967-08-04 | 1971-03-30 | Becton Dickinson Co | Device for dispensing inhalable fluids |
US3610478A (en) * | 1969-04-28 | 1971-10-05 | Mack S Johnston | Tapping device for beer kegs and the like |
US3648440A (en) * | 1969-09-02 | 1972-03-14 | Carborundum Co | Wet scrubber system |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4098853A (en) * | 1974-03-25 | 1978-07-04 | Chemetron Corporation | Humidifier and automatic control system therefor |
US4028444A (en) * | 1974-03-25 | 1977-06-07 | Chemetron Corporation | Humidifier and automatic control system therefor |
US4140735A (en) * | 1977-08-15 | 1979-02-20 | J. C. Schumacher Co. | Process and apparatus for bubbling gas through a high purity liquid |
US7441664B2 (en) | 2003-05-23 | 2008-10-28 | Pur Water Purification Products Inc. | Water treatment devices and cartridges therefor |
US20040232065A1 (en) * | 2003-05-23 | 2004-11-25 | Tanner John D. | Water treatment devices and cartridges therefor |
US8215492B2 (en) | 2003-09-18 | 2012-07-10 | Pur Water Purification Products, Inc. | Water treatment devices and cartridges therefor |
US20090008321A1 (en) * | 2003-09-18 | 2009-01-08 | Tanner John D | Water treatment devices and cartridges therefor |
US7407632B2 (en) | 2004-05-28 | 2008-08-05 | Oxysure Systems, Inc. | Apparatus and delivery of medically pure oxygen |
US20050265903A1 (en) * | 2004-05-28 | 2005-12-01 | Julian Ross | Apparatus and delivery of medically pure oxygen |
WO2007008194A3 (en) * | 2005-07-07 | 2007-08-02 | Oxysure Systems Inc | Apparatus and delivery of medically pure oxygen |
US11054183B2 (en) * | 2017-05-08 | 2021-07-06 | Cenorin, Llc | Medical implement drying apparatus |
US11052217B2 (en) * | 2017-05-17 | 2021-07-06 | ResMed Pty Ltd | Humidifier |
CN109708230A (zh) * | 2018-12-19 | 2019-05-03 | 李高勇 | 一种气体湿化装置 |
CN109708230B (zh) * | 2018-12-19 | 2021-08-31 | 浙江黄岩康宝利清香剂厂 | 一种气体湿化装置 |
Also Published As
Publication number | Publication date |
---|---|
IT980079B (it) | 1974-09-30 |
GB1437134A (en) | 1976-05-26 |
BE797607A (fr) | 1973-07-16 |
DE2329505B2 (de) | 1980-08-07 |
FR2189105A1 (he) | 1974-01-25 |
SE402055B (sv) | 1978-06-19 |
ES413666A1 (es) | 1976-06-01 |
AU5348873A (en) | 1974-09-19 |
PH10059A (en) | 1976-08-02 |
DE2329505C3 (de) | 1981-03-26 |
JPS4951793A (he) | 1974-05-20 |
FR2189105B1 (he) | 1977-12-30 |
DE2329505A1 (de) | 1974-01-17 |
CA986848A (en) | 1976-04-06 |
CH566143A5 (he) | 1975-09-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BAXTER TRAVENOL LABORATORIES, INC. A CORP. OF DE Free format text: MERGER;ASSIGNOR:AMERICAN HOSPITAL SUPPLY CORPORATION INTO;REEL/FRAME:004760/0345 Effective date: 19870126 |
|
AS | Assignment |
Owner name: BAXTER INTERNATIONAL INC. Free format text: CHANGE OF NAME;ASSIGNOR:BAXTER TRAVENOL LABORATORIES, INC., A CORP. OF DE;REEL/FRAME:005050/0870 Effective date: 19880518 |