US3538688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lower filter assembly
Assignee: Aeroglide Corp
•
Filing: 1968-06-13
•
Granted: 1970-11-10
•
Expires: 1988-06-13
Abstract
No abstract record available.
Inventors
- 👤 Charles P Stanley Jr
- 👤 Henry D Bowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:59
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; B01D45/16; B01D46/00; B01D46/10; B01D46/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB662072A
Cited
US2819890A
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US2853151A
Cited
US3155474A
Cited
US3240335A
Cited
US3369349A
Cited
US3355864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |