US3403498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing saponifiable and foreign substances from a gas stream
Assignee: American Air Filter Co Inc
•
Filing: 1966-11-04
•
Granted: 1968-10-01
•
Expires: 1986-11-04
Abstract
No abstract record available.
Inventors
- 👤 Pasha Mohiuddin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:24
CPC Classifications
B; B01; B01D; B01D50/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2333193A
Cited
US2889004A
Cited
US3090179A
Cited
US3237381A
Cited
US3183645A
Cited
US3242652A
Cited
US3260189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |