Patent US2940159A successfully refreshed from Google Patents.
US2940159A
Expired / Lapsed
US
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Apparatus for broaching spiral gears
Assignee: Individual
•
Filing: 1955-04-07
•
Granted: 1960-06-14
•
Expires: 1975-04-07
Abstract
No abstract record available.
Inventors
- 👤 Karl E Eklund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:42
CPC Classifications
B; B23; B23F; B23F21/00; B23F21/26; B23F21/268; B23F1/00; B23F1/08; B23F1/086; Y; Y10; Y10T; Y10T407/00; Y10T407/14; Y10T407/16; Y10T407/1614; Y10T409/00; Y10T409/10; Y10T409/109063; Y10T409/109222
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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |