Patent US2830792A successfully refreshed from Google Patents.
US2830792A
Expired / Lapsed
US
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Collar for drill steels
Assignee: Ingersoll Rand Co
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Filing: 1954-10-13
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Granted: 1958-04-15
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Expires: 1974-10-13
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Sears
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:17
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/08; Y; Y10; Y10S; Y10S279/00; Y10S279/906; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042; Y10T279/17085; Y10T279/17094; Y10T279/34; Y10T279/3406; Y10T279/3418; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49908; Y10T29/49936; Y10T29/49938; Y10T403/00; Y10T403/45; Y10T403/455
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1679324A
Cited
GB332914A
Cited
GB346217A
Cited
GB552305A
Cited
US2468985A
Cited
US2757028A
Cited
US2685274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |