US1639644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible coupling for shafts
Assignee: Westinghouse Electric Corp
•
Filing: 1922-03-04
•
Granted: 1927-08-23
•
Expires: 1942-03-04
Abstract
No abstract record available.
Inventors
- 👤 Baumann Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:03
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/50; F16D3/72; F16B; F16B2200/00; F16B2200/50; F16B2200/503; F16B2200/506; Y; Y10; Y10T; Y10T403/00; Y10T403/36; Y10T403/364
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) | 1930-08-22 | 1931-02-21 | 1931-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-08-22 | 1935-02-21 | 1935-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-08-22 | 1939-02-21 | 1939-08-23 | $7700.00 | Window Closed / Lapsed |