US2915854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microtome knife stroppers
Assignee: Individual
•
Filing: 1957-03-28
•
Granted: 1959-12-08
•
Expires: 1977-03-28
Abstract
No abstract record available.
Inventors
- 👤 Henry L Ettman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:16
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/04; G01N1/06; B; B24; B24B; B24B3/00; B24B3/36; B24B3/38; G01N2001/061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US285559A
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US403648A
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US521646A
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US604569A
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US667300A
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US1192709A
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US1900158A
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US1923719A
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US2052837A
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US2337718A
Cited
US2579680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |