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US3520146A
Expired / Lapsed
US
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Refrigeration system
Assignee: Carrier Corp
•
Filing: 1968-07-01
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Granted: 1970-07-14
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Expires: 1988-07-01
Abstract
No abstract record available.
Inventors
- 👤 Richard S Arnold Sr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:47
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0007; F24F5/001; F25; F25B; F25B1/00; F25B7/00; F28; F28C; F28C1/00; F28C1/02; Y; Y02; Y02B; Y02B30/00; Y02B30/70
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) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |