US2877902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Fram Corp
•
Filing: 1956-03-01
•
Granted: 1959-03-17
•
Expires: 1976-03-01
Abstract
No abstract record available.
Inventors
- 👤 Charles B Chase
- 👤 William S James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:59
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/30; B01D35/306; B01D27/00; B01D27/08; B01D27/10; B01D27/103; B01D27/106; Y; Y10; Y10S; Y10S116/00; Y10S116/42; Y10S210/00; Y10S210/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2511800A
Cited
US2271054A
Cited
US2522565A
Cited
US2555766A
Cited
US2750042A
Cited
US2743018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |