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Patent US2667074A successfully refreshed from Google Patents.
US2667074A
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Haemocytometer pipette
Assignee: Individual
•
Filing: 1952-05-09
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Granted: 1954-01-26
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Expires: 1972-05-09
Abstract
No abstract record available.
Inventors
- 👤 Stanley M Whitehill
- 👤 Fred A Groth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:15
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/15; A61B5/150007; A61B5/150015; A61B5/150022; A61B5/150053; A61B5/150061; A61B5/150099; A61B5/150206; A61B5/150229; A61B5/150274; A61B5/150343; A61B5/150755; B; B01; B01L; B01L3/00; B01L3/02; B01L3/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US291371A
Cited
US1576588A
Cited
US2104325A
Cited
GB476316A
Cited
FR833025A
Cited
US2219576A
Cited
US2289872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |