Patent US4120931A successfully refreshed from Google Patents.
Patent US2459635A successfully refreshed from Google Patents.
US2459635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas washer
Assignee: PETERS DALTON Inc
•
Filing: 1945-08-30
•
Granted: 1949-01-18
•
Expires: 1965-08-30
Abstract
No abstract record available.
Inventors
- 👤 Orrin E Fenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:38
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D47/022; B01D47/027; B05; B05B; B05B14/00; B05B14/40; B05B14/46; B05B14/468
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US191512A
Cited
US283025A
Cited
US585568A
Cited
US716380A
Cited
CH58659A
Cited
US1167909A
Cited
US1918531A
Cited
US2227465A
Cited
US2316491A
Cited
US2373330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-18 | 1952-07-19 | 1953-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-18 | 1956-07-19 | 1957-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-18 | 1960-07-19 | 1961-01-18 | $7700.00 | Window Closed / Lapsed |