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US3494145A
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Integral turbo compressor-expander system for refrigeration
Assignee: Studebaker Worthington Inc
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Filing: 1968-06-10
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Granted: 1970-02-10
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Expires: 1988-06-10
Abstract
No abstract record available.
Inventors
- 👤 Hunt Davis
- 👤 Malcolm L Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:14
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/10; F25B9/00; F25B9/06; F25J; F25J1/00; F25J1/003; F25J1/0047; F25J1/005; F25J1/0052; F25J1/02; F25J1/0243; F25J1/0279; F25J1/0285; F25J1/0288; F25B2309/00; F25B2309/14; F25B2309/1401; F25B2400/00; F25B2400/07; F25B2400/072; F25J2230/00; F25J2230/20; F25J2270/00; F25J2270/14; F25J2270/16; F25J2270/90; F25J2270/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |