US2292973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microtome
Assignee: SPENCER LENS CO
•
Filing: 1941-02-06
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Granted: 1942-08-11
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Expires: 1961-02-06
Abstract
No abstract record available.
Inventors
- 👤 Oscar W Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:51
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/04; G01N1/06; G01N1/28; G01N1/42; G01N2001/065; Y; Y10; Y10T; Y10T83/00; Y10T83/263; Y10T83/283; Y10T83/293; Y10T83/647; Y10T83/6584; Y10T83/6603
Claims Analysis
Total Claims: 0
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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) | 1945-08-10 | 1946-02-09 | 1946-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-08-10 | 1950-02-09 | 1950-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-08-10 | 1954-02-09 | 1954-08-11 | $7700.00 | Window Closed / Lapsed |