Patent US4175575A successfully refreshed from Google Patents.
Patent US3616263A successfully refreshed from Google Patents.
US3616263A
Expired / Lapsed
US
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Gas cap for culture tubes
Assignee: University of Tennessee Research Foundation
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Filing: 1969-06-16
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Granted: 1971-10-26
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Expires: 1989-06-16
Abstract
Abstract A cap for culture tubes for tubercle bacilli and other capnophilic micro-organisms and a modification thereof for anaerobic micro-organisms comprising a cylindrical screw cap within which is disposed a cup structure receiving a cylindrical, rupturable capsule containing CO2 or compounds that create an anaerobic condition.
Inventors
- 👤 Ernest J Anandam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:46
CPC Classifications
C; C12; C12M; C12M23/00; C12M23/32; C12M29/00; C12M41/00; C12M41/30; C12M41/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
21 words
A gas cap and culture tube combination in accordance with claim 1 in which the capsule is formed of thin glass.
Claim 2
Dependent Claim
20 words
A gas cap and culture tube combination in accordance with claim 1 in which the capsule is formed of plastic.
Claim 3
Dependent Claim
28 words
A gas cap and culture tube combination in accordance with claim 1 in which the capsule is on the order of r 0.4 cm. and h 2 cm.
Claim 4
Dependent Claim
21 words
A gas cap and culture tube combination in accordance with claim 1 in which the capsule is filled with CO2 gas.
Claim 5
Dependent Claim
40 words
A gas cap and culture tube combination in accordance with claim 1 in which the capsule is divided by a vertical septum into two equal chambers containing equal amounts of two anaerobic reagents, which combine upon rupturing of the capsule.
Claim 6
Dependent Claim
36 words
A gas cap and culture tube combination in accordance with claim 6 in which the reagents are 10 percent aqueous potassium hydroxide and 40 percent aqueous pyrogallic acid, which combine to form an alkaline pyrogallic acid.
Claim 7
Dependent Claim
36 words
A gas cap and culture tube combination in accordance with claim 1 in which the bottom of said cup is provided with a fine mesh screen to prevent ingress of capsule fragments into the culture tube.
Claim 8
Dependent Claim
29 words
A gas cap and culture tube combination in accordance with claim 6 in which a mesh bag filled with cotton is provided beneath the lower surface of said cup.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |