US3022806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Router dust guard
Assignee: Individual
•
Filing: 1960-01-13
•
Granted: 1962-02-27
•
Expires: 1980-01-13
Abstract
No abstract record available.
Inventors
- 👤 Elmer F Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:41
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/0042; B23Q11/0046; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/304088; Y10T409/306216; Y10T409/306552; Y10T409/306608; Y10T83/00; Y10T83/263
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |