Patent US2500340A successfully refreshed from Google Patents.
US2500340A
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Method of resurfacing piston chambers
Assignee: Individual
•
Filing: 1945-09-22
•
Granted: 1950-03-14
•
Expires: 1965-09-22
Abstract
No abstract record available.
Inventors
- 👤 Carson B Boulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:35
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/10; B23P15/105; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49231; Y10T29/49233; Y10T29/4927; Y10T29/49826; Y10T29/49945; Y10T29/53; Y10T29/53796; Y10T29/53839; Y10T29/53843; Y10T29/53909; Y10T29/5393
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |