US2901820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of covering a drum filter, or such like, with wire gauze
Assignee: Individual
•
Filing: 1956-04-19
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Granted: 1959-09-01
•
Expires: 1976-04-19
Abstract
No abstract record available.
Inventors
- 👤 Clarin Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:04
CPC Classifications
B; B21; B21F; B21F27/00; B21F27/12; B21F27/18; B01; B01D; B01D33/00; B01D33/06; B01D33/067; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49602; Y10T29/49801; Y10T29/49826; Y10T29/49863; Y10T29/49874
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1942304A
Cited
GB449093A
Cited
US2095599A
Cited
US2242326A
Cited
US2295420A
Cited
US2711575A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |