Patent US2161600A successfully refreshed from Google Patents.
US1974784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission means
Assignee: Individual
•
Filing: 1933-05-11
•
Granted: 1934-09-25
•
Expires: 1953-05-11
Abstract
No abstract record available.
Inventors
- 👤 Charles F Pilcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:28
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/80; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19251; Y10T74/19256; Y10T74/1926; Y10T74/19265
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1937-09-24 | 1938-03-26 | 1938-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-09-24 | 1942-03-26 | 1942-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-09-24 | 1946-03-26 | 1946-09-25 | $7700.00 | Window Closed / Lapsed |