US2949285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas washing apparatus
Assignee: Ajem Laboratories Inc
•
Filing: 1958-04-22
•
Granted: 1960-08-16
•
Expires: 1978-04-22
Abstract
No abstract record available.
Inventors
- 👤 Umbricht Emil
- 👤 Steenhagen Gerrit
- 👤 Dewey M Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:44
CPC Classifications
B; B01; B01D; B01D50/00; B01D33/00; B01D33/15; B01D33/44; B01D33/48; B01D33/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1487743A
Cited
US1650152A
Cited
US1994912A
Cited
US2103483A
Cited
US2458139A
Cited
US2599202A
Cited
US2650080A
Cited
US2833417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |