Patent US1809402A successfully refreshed from Google Patents.
US1809402A
Expired / Lapsed
US
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Relieving device for high speed drills
Assignee: Individual
•
Filing: 1926-03-22
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Granted: 1931-06-09
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Expires: 1946-03-22
Abstract
No abstract record available.
Inventors
- 👤 Frank L Cone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:35
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/32; B23Q2705/00; B23Q2705/10; B23Q2705/16; B23Q2705/165; Y; Y10; Y10T; Y10T408/00; Y10T408/23
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) | 1934-06-08 | 1934-12-08 | 1935-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-06-08 | 1938-12-08 | 1939-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-06-08 | 1942-12-08 | 1943-06-09 | $7700.00 | Window Closed / Lapsed |