Patent US2873620A successfully refreshed from Google Patents.
US2873620A
Expired / Lapsed
US
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Control mechanisms
Assignee: Individual
•
Filing: 1954-02-10
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Granted: 1959-02-17
•
Expires: 1974-02-10
Abstract
No abstract record available.
Inventors
- 👤 Sinclair Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:44
CPC Classifications
B; B66; B66C; B66C9/00; B66C9/16; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19014
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1328934A
Cited
US1900470A
Cited
US1964188A
Cited
US2104582A
Cited
US2123038A
Cited
US2255773A
Cited
US2666876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |