Patent US1401052A successfully refreshed from Google Patents.
US1401052A
Expired / Lapsed
US
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Dust-catcher valve and valve-operating mechanism
Assignee: Individual
•
Filing: 1920-02-07
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Granted: 1921-12-20
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Expires: 1940-02-07
Abstract
No abstract record available.
Inventors
- 👤 Alfred C Danks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:38
CPC Classifications
C; C10; C10K; C10K1/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7876
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) | 1924-12-19 | 1925-06-20 | 1925-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-12-19 | 1929-06-20 | 1929-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-12-19 | 1933-06-20 | 1933-12-20 | $7700.00 | Window Closed / Lapsed |