US1335391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal-controlled circulating system
Assignee: Findeisen & Kropf Manufacturing Co
•
Filing: 1916-12-26
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Granted: 1920-03-30
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Expires: 1936-12-26
Abstract
No abstract record available.
Inventors
- 👤 Charles L Rayfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:48
CPC Classifications
F; F02; F02B; F02B47/00; F02B47/02; F01; F01P; F01P7/00; F01P7/14; F01P7/16; F01P2070/00; F01P2070/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1923-03-30 | 1923-09-29 | 1924-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-03-30 | 1927-09-29 | 1928-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-03-30 | 1931-09-29 | 1932-03-30 | $7700.00 | Window Closed / Lapsed |