US2276527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heating fluids
Assignee: PETRO CHEM DEV Co
•
Filing: 1941-03-24
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Granted: 1942-03-17
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Expires: 1961-03-24
Abstract
No abstract record available.
Inventors
- 👤 John W Throckmorton
- 👤 John S Wallis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:45
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20; F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/14; F28F1/16
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) | 1945-03-16 | 1945-09-15 | 1946-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-16 | 1949-09-15 | 1950-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-16 | 1953-09-15 | 1954-03-17 | $7700.00 | Window Closed / Lapsed |