US2888141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Fram Corp
•
Filing: 1956-11-27
•
Granted: 1959-05-26
•
Expires: 1976-11-27
Abstract
No abstract record available.
Inventors
- 👤 Peter R Coates
- 👤 Herbert G Kamrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:38
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/30; B01D35/306; B01D27/00; B01D27/08; B01D27/10; B01D27/103; B01D27/106; Y; Y10; Y10S; Y10S210/00; Y10S210/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2108798A
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US2372286A
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US2471069A
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GB678934A
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US2591248A
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US2631732A
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US2639783A
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US2748934A
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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) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |