US2977828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbide drill
Assignee: United Greenfield Corp
•
Filing: 1959-03-26
•
Granted: 1961-04-04
•
Expires: 1979-03-26
Abstract
No abstract record available.
Inventors
- 👤 Royce M Strickland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:04
CPC Classifications
B; B23; B23B; B23B51/00; B23B2251/00; B23B2251/14; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/909; Y10T408/9093
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE19182E
Cited
US2889725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |