Patent US3423941A successfully refreshed from Google Patents.
US3423941A
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US
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Temperature and flow regulating apparatus
Assignee: Combustion Engineering Inc
•
Filing: 1965-12-20
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Granted: 1969-01-28
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Expires: 1985-12-20
Abstract
No abstract record available.
Inventors
- 👤 Frederick P Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:14
CPC Classifications
F; F01; F01K; F01K3/00; F01K3/18; F01K3/20; F01K3/22; F01K19/00; F01K19/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1923515A
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US2346672A
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US2399842A
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US2298242A
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US2768707A
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US2864463A
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US2891632A
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US3034647A
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US3183896A
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US3286466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |