Patent US2685729A successfully refreshed from Google Patents.
US2685729A
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Method of making composite piston structures
Assignee: Individual
•
Filing: 1951-05-10
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Granted: 1954-08-10
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Expires: 1971-05-10
Abstract
No abstract record available.
Inventors
- 👤 Frank A Bower
- 👤 Daub Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:55
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/22; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249; Y10T29/49256; Y10T29/49261; Y10T29/49265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1790230A
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US1777369A
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US1781207A
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US1830519A
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US1978045A
Cited
DE611383C
Cited
DE619877C
Cited
US2278958A
Cited
FR897373A
Cited
US2578021A
Cited
US2550879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |