Patent US3498061A successfully refreshed from Google Patents.
US3498061A
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Hydraulic supercharge and cooling circuit
Assignee: FRANKLIN I SIEGRIST
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Filing: 1968-05-29
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Granted: 1970-03-03
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Expires: 1988-05-29
Abstract
No abstract record available.
Inventors
- 👤 Harold E Prucha
- 👤 Franklin I Siegrist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:50
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/04; F15B21/042; F15B21/0423; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/20576; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/50554; F15B2211/515; F15B2211/5157; F15B2211/60; F15B2211/61; F15B2211/613; F15B2211/62; F15B2211/63; F15B2211/6303; F15B2211/6343; Y; Y10; Y10S; Y10S60/00; Y10S60/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2166940A
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US2005731A
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US2155421A
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US2246461A
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US2472477A
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US2867091A
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US3044639A
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US3365885A
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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) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |