Patent US1978879A successfully refreshed from Google Patents.
US1978879A
Expired / Lapsed
US
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Drilling machine
Assignee: Oilgear Co
•
Filing: 1930-02-24
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Granted: 1934-10-30
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Expires: 1950-02-24
Abstract
No abstract record available.
Inventors
- 👤 Ferris Walter
- 👤 Wiedman Ernst
- 👤 Clute Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:55
CPC Classifications
B; B23; B23B; B23B39/00; B23B39/16; B23B39/22; Y; Y10; Y10T; Y10T408/00; Y10T408/16; Y10T408/17; Y10T408/36; Y10T408/375; Y10T408/378; Y10T408/3796; Y10T408/65; Y10T408/675; Y10T408/6757; Y10T408/6779
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) | 1937-10-29 | 1938-04-30 | 1938-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-10-29 | 1942-04-30 | 1942-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-10-29 | 1946-04-30 | 1946-10-30 | $7700.00 | Window Closed / Lapsed |