US3243943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unit filter construction
Assignee: American Air Filter Co Inc
•
Filing: 1964-06-15
•
Granted: 1966-04-05
•
Expires: 1984-06-15
Abstract
No abstract record available.
Inventors
- 👤 Allan R Getzin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:32
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/523; B01D29/00; B01D29/01; B01D29/05; B01D29/07; B01D46/10; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24686
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1564178A
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US2058669A
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US2080154A
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FR781883A
Cited
FR977538A
Cited
US2479722A
Cited
US2766983A
Cited
US2915426A
Cited
US2907408A
Cited
US2988227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |