US1370470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter-frame for use with pressure-filters
Assignee: MARTEL FILTER Co Inc
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Filing: 1920-03-11
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Granted: 1921-03-01
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Expires: 1940-03-11
Abstract
No abstract record available.
Inventors
- 👤 Louis J Martel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:20
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/01; B01D2201/00; B01D2201/04; B01D2201/0415
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) | 1924-02-29 | 1924-08-30 | 1925-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-02-29 | 1928-08-30 | 1929-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-02-29 | 1932-08-30 | 1933-03-01 | $7700.00 | Window Closed / Lapsed |