Patent US2779431A successfully refreshed from Google Patents.
US2779431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering device
Assignee: Motors Liquidation Co
•
Filing: 1953-04-08
•
Granted: 1957-01-29
•
Expires: 1973-04-08
Abstract
No abstract record available.
Inventors
- 👤 Wesley W Mcmullen
- 👤 Joseph N Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:23
CPC Classifications
F; F16; F16B; F16B2/00; F16B2/20; F16B2/22; F16B2/24; F16B2/241; F02; F02M; F02M35/00; F02M35/02; F02M35/026
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1926433A
Cited
US2150745A
Cited
US2252724A
Cited
US2168472A
Cited
US2234736A
Cited
US2251789A
Cited
US2269663A
Cited
GB545089A
Cited
US2406188A
Cited
US2513946A
Cited
US2620893A
Cited
US2556292A
Cited
US2625722A
Cited
US2632929A
Cited
US2665771A
Cited
US2709498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |