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Patent US2178614A successfully refreshed from Google Patents.
US2178614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter
Assignee: Owens Corning
•
Filing: 1933-04-10
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Granted: 1939-11-07
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Expires: 1953-04-10
Abstract
No abstract record available.
Inventors
- 👤 Slayter Games
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:21
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; Y; Y10; Y10S; Y10S55/00; Y10S55/24; Y10S55/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-11-06 | 1943-05-08 | 1943-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-11-06 | 1947-05-08 | 1947-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-11-06 | 1951-05-08 | 1951-11-07 | $7700.00 | Window Closed / Lapsed |