US1956683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe coupling
Assignee: Westinghouse Air Brake Co
•
Filing: 1931-11-19
•
Granted: 1934-05-01
•
Expires: 1951-11-19
Abstract
No abstract record available.
Inventors
- 👤 Ellis E Hewitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:57
CPC Classifications
F; F16; F16L; F16L19/00; F16L19/08; F16L23/00; F16L23/02; F16L23/024; Y; Y10; Y10T; Y10T403/00; Y10T403/36; Y10T403/364; Y10T403/366
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) | 1937-04-30 | 1937-10-30 | 1938-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-04-30 | 1941-10-30 | 1942-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-04-30 | 1945-10-30 | 1946-05-01 | $7700.00 | Window Closed / Lapsed |