Patent US2487638A successfully refreshed from Google Patents.
US2487638A
Expired / Lapsed
US
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Reamer
Assignee: Individual
•
Filing: 1946-08-28
•
Granted: 1949-11-08
•
Expires: 1966-08-28
Abstract
No abstract record available.
Inventors
- 👤 Paul F Danielson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:32
CPC Classifications
B; B23; B23D; B23D77/00; B23D77/14; Y; Y10; Y10S; Y10S408/00; Y10S408/709; Y10T; Y10T408/00; Y10T408/55; Y10T408/557; Y10T408/558; Y10T408/5583; Y10T408/83; Y10T408/85; Y10T408/858; Y10T408/8598; Y10T408/86; Y10T408/865; Y10T82/00; Y10T82/12; Y10T82/122
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) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |