US3490245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cleaning regenerators for cryogenic systems
Assignee: Texaco Inc
•
Filing: 1966-12-20
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Granted: 1970-01-20
•
Expires: 1986-12-20
Abstract
No abstract record available.
Inventors
- 👤 James R Muenger
- 👤 David L Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:09
CPC Classifications
F; F25; F25J; F25J5/00; F25J3/00; F25J3/02; F25J3/0204; F25J3/0223; F25J3/0228; F25J3/0276; F28; F28D; F28D17/00; F28G; F28G13/00; F25J2205/00; F25J2205/24; F25J2205/30; F25J2210/00; F25J2210/42; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1842263A
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US2039889A
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GB469943A
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US2460859A
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US2499043A
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US2682157A
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US3036439A
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US2989443A
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US2996890A
Cited
US3192729A
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US3097940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |