Patent US1968990A successfully refreshed from Google Patents.
US1968990A
Expired / Lapsed
US
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Hydraulically indexed machine tool
Assignee: ROCKFORD DRILLING MACHINE CO
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Filing: 1931-07-08
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Granted: 1934-08-07
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Expires: 1951-07-08
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:30
CPC Classifications
B; B23; B23Q; B23Q16/00; B23Q16/02; B23Q16/04; B23Q16/06; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5152; Y10T29/5154; Y10T29/5158; Y10T408/00; Y10T408/36; Y10T408/38; Y10T408/3833; Y10T408/65; Y10T408/675; Y10T408/6757; Y10T409/00; Y10T409/30; Y10T409/30868; Y10T409/308792; Y10T74/00; Y10T74/14; Y10T74/1418; Y10T74/1424; Y10T74/1453; Y10T74/1459; Y10T74/1465; Y10T74/15; Y10T74/1526; Y10T74/1532
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) | 1937-08-06 | 1938-02-05 | 1938-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-08-06 | 1942-02-05 | 1942-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-08-06 | 1946-02-05 | 1946-08-07 | $7700.00 | Window Closed / Lapsed |