US2738808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring biased diaphragm device
Assignee: Motors Liquidation Co
•
Filing: 1950-10-14
•
Granted: 1956-03-20
•
Expires: 1970-10-14
Abstract
No abstract record available.
Inventors
- 👤 Herman L Hartzell
- 👤 John W Dyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:04
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/05; F02P5/10; F02P5/103
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1790206A
Cited
US1999285A
Cited
GB503463A
Cited
US2447261A
Cited
US2380983A
Cited
US2444163A
Cited
US2658526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |