Patent US2705667A successfully refreshed from Google Patents.
US2705667A
Expired / Lapsed
US
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Pistons
Assignee: Permold Co
•
Filing: 1953-04-28
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Granted: 1955-04-05
•
Expires: 1973-04-28
Abstract
No abstract record available.
Inventors
- 👤 Everett G Fahlman
- 👤 Forrest E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:49
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/02; F02F3/04; F02F3/042; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; F05C2201/04; F05C2201/0433; F05C2201/0448
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2139271A
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US2062624A
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US1853450A
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US1600558A
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US1891419A
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GB399853A
Cited
US2044087A
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US2097570A
Cited
US2136822A
Cited
US2141784A
Cited
FR887977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-04 | 1958-10-04 | 1959-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-04 | 1962-10-04 | 1963-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-04 | 1966-10-04 | 1967-04-05 | $7700.00 | Window Closed / Lapsed |