US3891509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
CO{HD 2 {B generating tablet for culture devices
Assignee: Clinical Convenience Products Inc
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Filing: 1974-05-06
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Granted: 1975-06-24
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Expires: 1994-05-06
Abstract
Abstract A tablet suitable for insertion into loosely capped culture devices to produce increased carbon dioxide tension therein comprising in combination a carbon dioxide couple, polyvinylpyrollidone, and a long chain fatty acid ester of a polyhydroxy alcohol.
Inventors
- 👤 Don R Warren
- 👤 Louis W Busse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:28
CPC Classifications
C; C12; C12M; C12M41/00; C12M41/30; C12M41/34
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
56 words
A tablet suitable for insertion into culture tubes to generate and release carbon dioxide therein which comprises about 25% to about 65% by weight of a carbon dioxide couple, about 30% to about 60% by weight of polyvinylpyrollidone and about 5% to about 15% by weight of a long chain fatty acid ester of polyhydroxy alcohol.
Claim 2
Dependent Claim
56 words
A tablet suitable for insertion into culture tubes to generate and release carbon dioxide therein which comprises about 25% to about 65% by weight of a carbon dioxide couple, about 30% to about 60% by weight of polyvinylpyrollidone and about 5% to about 15% by weight of a long chain fatty acid ester of polyhydroxy alcohol.
Claim 3
Dependent Claim
18 words
A tablet according to claim 1 wherein the carbon dioxide couple comprises a non-toxic acid and a carbonate.
Claim 4
Dependent Claim
17 words
A tablet according to claim 2 wherein the carbon dioxide couple comprises sodium bicarbonate and citric acid.
Claim 5
Dependent Claim
28 words
A tablet according to claim 1 wherein the fatty acid chain of the fatty acid ester of the polyhydroxy alcohol contains from about 14 to 18 carbon atoms.
Claim 6
Dependent Claim
18 words
A tablet according to claim 4 Wherein the fatty acid ester of the polyhydroxy alcohol is glyceryl monostearate.
Claim 7
Dependent Claim
54 words
A tablet suitable for producing increased carbon dioxide tension inside a culture tube which comprises about 25% to about 65% by weight of a carbon dioxide couple consisting of sodium bicarbonate and citric acid, about 30% to about 60% by weight of polyvinylpyrollidone and about 5% to about 15% by weight of glyceryl monostearate.
Claim 8
Dependent Claim
54 words
A tablet suitable for producing increased carbon dioxide tension inside a culture tube which comprises about 25% to about 65% by weight of a carbon dioxide couple consisting of sodium bicarbonate and citric acid, about 30% to about 60% by weight of polyvinylpyrollidone and about 5% to about 15% by weight of glyceryl monostearate.
Claim 9
Dependent Claim
23 words
A tablet according to claim 6 wherein the ratio of citric acid to sodium bicarbonate in the carbon dioxide couple is 1: 1.25.
Claim 10
Dependent Claim
21 words
A tablet according to claim 7 wherein the polyvinylpyrollidone and the carbon dioxide couple are present in equal amount by weight.
Claim 11
Dependent Claim
30 words
A tablet according to claim 8 wherein the carbon dioxide couple is present in an amount of 45% by weight, polyvinylpyrollidone 45% by weight and glyceryl monostearate 10% by weight.
Claim 12
Independent Claim
71 words
A METHOD FOR GENERATING AND MAINTAINING INCREASED CARBON DIOXIDE TENSIONS IN LOOSELY CAPPED CULTURE VIALS UTILIZING AN INDEPENDENT CULTURE MEDIA SUPPORT, WHICH COMPRISES INSERTING INTO SUCH CULTURE VIALS A TABLET COMPRISING ABOUT 25% TO ABOUT 65% BY WEIGHT OF A CARBON DIOXIDE COUPLE, ABOUT 30% TO ABOUT 60% BY WEIGHT OF POLYVINYLPYROLLIDONE AND ABOUT 5% TO ABOUT 15% BY WEIGHT OF A LONG CHAIN FATTY ACID ESTER OF A POLYHYDROXY ALCOHOL.
Claim 13
Independent Claim
71 words
A METHOD FOR GENERATING AND MAINTAINING INCREASED CARBON DIOXIDE TENSIONS IN LOOSELY CAPPED CULTURE VIALS UTILIZING AN INDEPENDENT CULTURE MEDIA SUPPORT, WHICH COMPRISES INSERTING INTO SUCH CULTURE VIALS A TABLET COMPRISING ABOUT 25% TO ABOUT 65% BY WEIGHT OF A CARBON DIOXIDE COUPLE, ABOUT 30% TO ABOUT 60% BY WEIGHT OF POLYVINYLPYROLLIDONE AND ABOUT 5% TO ABOUT 15% BY WEIGHT OF A LONG CHAIN FATTY ACID ESTER OF A POLYHYDROXY ALCOHOL.
References Cited (Backward Citations)
US3098016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |