US3434269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter cell retaining apparatus
Assignee: American Air Filter Co Inc
•
Filing: 1967-08-09
•
Granted: 1969-03-25
•
Expires: 1987-08-09
Abstract
No abstract record available.
Inventors
- 👤 Philip L Hyatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:22
CPC Classifications
B; B01; B01D; B01D46/00; Y; Y10; Y10T; Y10T292/00; Y10T292/45
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB499914A
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US2391884A
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US2329356A
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US2460423A
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US2907408A
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US2966959A
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US3118836A
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US3100557A
Cited
US3247652A
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US3242656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |