US2439671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knife holder for microtomes
Assignee: Individual
•
Filing: 1944-11-01
•
Granted: 1948-04-13
•
Expires: 1964-11-01
Abstract
No abstract record available.
Inventors
- 👤 Harvey N Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:54
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/04; G01N1/06; G01N2001/061; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44291; Y10T24/44496; Y10T24/44504; Y10T83/00; Y10T83/929; Y10T83/9457; Y10T83/9488
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1026280A
Cited
US1197544A
Cited
GB165974A
Cited
US1534665A
Cited
US1765283A
Cited
US1865539A
Cited
US1998428A
Cited
US2078078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-13 | 1951-10-13 | 1952-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-13 | 1955-10-13 | 1956-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-13 | 1959-10-13 | 1960-04-13 | $7700.00 | Window Closed / Lapsed |