US2555643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction gearing for telegraphone mechanism
Assignee: Individual
•
Filing: 1947-12-11
•
Granted: 1951-06-05
•
Expires: 1967-12-11
Abstract
No abstract record available.
Inventors
- 👤 Harrison Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:44
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/22; G11B15/26; G11B15/44; G11B15/46; G11B15/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-04 | 1954-12-04 | 1955-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-04 | 1958-12-04 | 1959-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-04 | 1962-12-04 | 1963-06-05 | $7700.00 | Window Closed / Lapsed |