Patent US2863186A successfully refreshed from Google Patents.
US2863186A
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US
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Prevention of blow-by in cavitated assemblies
Assignee: Individual
•
Filing: 1956-05-23
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Granted: 1958-12-09
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Expires: 1976-05-23
Abstract
No abstract record available.
Inventors
- 👤 Richard L Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:18
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/06; B22C7/062; Y; Y10; Y10S; Y10S277/00; Y10S277/931; Y10S277/933; Y10S425/00; Y10S425/047
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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |