US2966958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas treating device
Assignee: American Air Filter Co Inc
•
Filing: 1957-12-16
•
Granted: 1961-01-03
•
Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 Robert W Sexton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:20
CPC Classifications
F; F24; F24F; F24F8/00; F24F8/10; F24F8/117; F24F8/133; B; B01; B01D; B01D47/00; B01D47/02; B01D47/021; B01D47/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1103789A
Cited
US1702804A
Cited
US1564949A
Cited
US1828816A
Cited
US1851427A
Cited
US1946291A
Cited
US2083649A
Cited
US2387278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-03 | 1964-07-04 | 1965-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-03 | 1968-07-04 | 1969-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-03 | 1972-07-04 | 1973-01-03 | $7700.00 | Window Closed / Lapsed |