Patent US2425152A successfully refreshed from Google Patents.
US2425152A
Expired / Lapsed
US
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Plastic refractory
Assignee: Briggs Filtration Co
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Filing: 1946-05-02
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Granted: 1947-08-05
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Expires: 1966-05-02
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Greger
- 👤 John J Reimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:42
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/34; Y; Y10; Y10S; Y10S210/00; Y10S210/07
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) | 1950-08-04 | 1951-02-03 | 1951-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-04 | 1955-02-03 | 1955-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-04 | 1959-02-03 | 1959-08-05 | $7700.00 | Window Closed / Lapsed |