US2936075A
Expired / Lapsed
US
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Assignee: DAVIS FILTRATION EQUIPMENT CO
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Filing: 1958-03-04
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Granted: 1960-05-10
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Expires: 1978-03-04
Abstract
No abstract record available.
Inventors
- 👤 Gordon H Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:12
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/39; B01D29/62; B01D29/64; B01D29/6438; B01D29/6446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |