US2666244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling hook bill safety latch
Assignee: BREWSTER Co
•
Filing: 1952-12-10
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Granted: 1954-01-19
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Expires: 1972-12-10
Abstract
No abstract record available.
Inventors
- 👤 James T Carmichael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:38
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/22; B66C1/34; B66C1/36; E; E21; E21B; E21B19/00; E21B19/02; E21B19/04; F; F16; F16B; F16B45/00; F16B45/02; F16B45/021
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) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |