US3443366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter assemblage
Assignee: Individual
•
Filing: 1967-10-05
•
Granted: 1969-05-13
•
Expires: 1987-10-05
Abstract
No abstract record available.
Inventors
- 👤 Louis Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:55
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02
Claims Analysis
Total Claims: 0
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US2833372A
Cited
US2865465A
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US2853154A
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US2975863A
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US3034273A
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US3236033A
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US3204391A
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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) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |