US2712936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet registering mechanisms
Assignee: Individual
•
Filing: 1951-05-08
•
Granted: 1955-07-12
•
Expires: 1971-05-08
Abstract
No abstract record available.
Inventors
- 👤 Backhouse Headley Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:30
CPC Classifications
B; B65; B65H; B65H9/00; B65H9/10; B65H9/103; B65H9/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US153199A
Cited
US161310A
Cited
US1040168A
Cited
US1978056A
Cited
US1956229A
Cited
US1976601A
Cited
US2224138A
Cited
US2269571A
Cited
US2368098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-11 | 1959-01-10 | 1959-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-11 | 1963-01-10 | 1963-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-11 | 1967-01-10 | 1967-07-12 | $7700.00 | Window Closed / Lapsed |