US2942501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill
Assignee: United Greenfield Corp
•
Filing: 1957-12-16
•
Granted: 1960-06-28
•
Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 William J Kallio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:32
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/06; B23B51/063; B23B51/04; B23B51/0486; B23B51/066; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/895; Y10T408/8957
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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |