Patent US2771398A successfully refreshed from Google Patents.
US2771398A
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Method and apparatus for counting microorganisms
Assignee: Individual
•
Filing: 1953-09-17
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Granted: 1956-11-20
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Expires: 1973-09-17
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:54
CPC Classifications
C; C12; C12M; C12M41/00; C12M41/30; C12M41/36; Y; Y10; Y10S; Y10S435/00; Y10S435/805; Y10S435/8215; Y10S435/822; Y10S435/88; Y10S435/881
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A DEVICE FOR DETERMINING THE CONCENTRATION OF MICROORGANISMS IN A LIQUID WHICH CONSISTS OF A SLAB-LIKE FORM PROVIDED WITH A PLURALITY OF RELATIVELY UNIFORM OPENINGS THERETHROUGH; SAID OPENINGS BEING OF A CAPILLARY SIZE FOR HOLDING LIQUID SAMPLES THEREIN BY CAPILLARY ATTRACTION: SAID SLAB-LIKE FORM BEING MADE OF POLYMERIZED TETRA-FLUORO ETHYLENE.
Claim 2
Independent Claim
50 words
A DEVICE FOR DETERMINING THE CONCENTRATION OF MICROORGANISMS IN A LIQUID WHICH CONSISTS OF A SLAB-LIKE FORM PROVIDED WITH A PLURALITY OF RELATIVELY UNIFORM OPENINGS THERETHROUGH; SAID OPENINGS BEING OF A CAPILLARY SIZE FOR HOLDING LIQUID SAMPLES THEREIN BY CAPILLARY ATTRACTION: SAID SLAB-LIKE FORM BEING MADE OF POLYMERIZED TETRA-FLUORO ETHYLENE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |