Patent US2300253A successfully refreshed from Google Patents.
US2300253A
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US
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Drilling and countersinking machine
Assignee: Curtiss Wright Corp
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Filing: 1941-06-24
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Granted: 1942-10-27
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Expires: 1961-06-24
Abstract
No abstract record available.
Inventors
- 👤 Ernest L Hamilton
- 👤 Lawrence V Whistler
- 👤 William G Dechend
- 👤 John J Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:23
CPC Classifications
B; B23; B23B; B23B41/00; Y; Y10; Y10T; Y10T408/00; Y10T408/16; Y10T408/175; Y10T408/36; Y10T408/37; Y10T408/375; Y10T408/378; Y10T408/3796; Y10T408/52; Y10T408/54; Y10T409/00; Y10T409/30; Y10T409/30868; Y10T409/308792; Y10T74/00; Y10T74/14; Y10T74/1494
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) | 1945-10-26 | 1946-04-27 | 1946-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-10-26 | 1950-04-27 | 1950-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-10-26 | 1954-04-27 | 1954-10-27 | $7700.00 | Window Closed / Lapsed |