US3053030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas filtering method and apparatus
Assignee: American Air Filter Co Inc
•
Filing: 1958-12-22
•
Granted: 1962-09-11
•
Expires: 1978-12-22
Abstract
No abstract record available.
Inventors
- 👤 Tom R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:59
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/42; B01D46/44; B01D46/46; B01D46/66; B01D46/70; B01D46/71; B01D46/79
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US176571A
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US1118045A
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US1397557A
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US2201520A
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US2633929A
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US2765047A
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US2805731A
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GB791510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |