US1820703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling mechanism
Assignee: LEONIDAS D WOODRUFF
•
Filing: 1928-08-01
•
Granted: 1931-08-25
•
Expires: 1948-08-01
Abstract
No abstract record available.
Inventors
- 👤 Wallace R Hungerford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:24
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/08; F16L37/12; F16L37/121; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17761; Y10T279/17769; Y10T279/17777; Y10T403/00; Y10T403/36; Y10T403/364; Y10T403/368; Y10T403/67
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) | 1934-08-24 | 1935-02-23 | 1935-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-08-24 | 1939-02-23 | 1939-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-08-24 | 1943-02-23 | 1943-08-25 | $7700.00 | Window Closed / Lapsed |