Patent US2914987A successfully refreshed from Google Patents.
US2914987A
Expired / Lapsed
US
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Slit mechanisms
Assignee: Individual
•
Filing: 1954-06-03
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Granted: 1959-12-01
•
Expires: 1974-06-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry M Crosswhite
- 👤 William G Fastie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:47
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2005889A
Cited
US2096964A
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US2408512A
Cited
US2611266A
Cited
US2664028A
Cited
US2582410A
Cited
US2705440A
Cited
US2757568A
Cited
US2730007A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |