Patent US3022097A successfully refreshed from Google Patents.
US3022097A
Expired / Lapsed
US
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Dust guard
Assignee: Individual
•
Filing: 1956-06-27
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Granted: 1962-02-20
•
Expires: 1976-06-27
Abstract
No abstract record available.
Inventors
- 👤 Seniff Russell Wade
- 👤 Fracalossi Roland Nicholas
- 👤 Kangas Pell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:33
CPC Classifications
B; B61; B61F; B61F15/00; B61F15/20; B61F15/22; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |