US3385039A
Expired / Lapsed
US
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Assignee: BURKE AND CO
•
Filing: 1966-12-20
•
Granted: 1968-05-28
•
Expires: 1986-12-20
Abstract
No abstract record available.
Inventors
- 👤 Valentine J Burke
- 👤 John M Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:55
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D2265/00; B01D2265/06; B01D2271/00; B01D2271/02; B01D2271/022; B01D2275/00; B01D2275/20; B01D2275/206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2776726A
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US2938597A
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US3034772A
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US3273321A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |