US1515007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Base-exchange material and process of making same
Assignee: INTERNAT FILTER Co
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Filing: 1923-10-08
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Granted: 1924-11-11
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Expires: 1943-10-08
Abstract
No abstract record available.
Inventors
- 👤 Abraham S Behrman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:56
CPC Classifications
A; A23; A23C; A23C9/00; A23C9/14; A23C9/146; C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/46
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) | 1927-11-11 | 1928-05-12 | 1928-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-11-11 | 1932-05-12 | 1932-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-11-11 | 1936-05-12 | 1936-11-11 | $7700.00 | Window Closed / Lapsed |