Patent US3209736A successfully refreshed from Google Patents.
US3209736A
Expired / Lapsed
US
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Engine
Assignee: Southwest Research Institute
•
Filing: 1964-01-14
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Granted: 1965-10-05
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Expires: 1984-01-14
Abstract
No abstract record available.
Inventors
- 👤 Julius E Witzky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:02
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/28; F01; F01B; F01B7/00; F01B7/02; F01B7/04; F01B7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR479623A
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US1693280A
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US2079156A
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US2305310A
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US2342410A
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US2357031A
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US2500823A
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US2607189A
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US2666618A
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US2861774A
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GB779631A
Cited
US2759461A
Cited
US2865348A
Cited
US2910973A
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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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |