US2501795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer equipment
Assignee: Fluor Corp
•
Filing: 1947-07-07
•
Granted: 1950-03-28
•
Expires: 1967-07-07
Abstract
No abstract record available.
Inventors
- 👤 Foster M Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:39
CPC Classifications
F; F28; F28B; F28B1/00; F28B1/06; Y; Y10; Y10S; Y10S165/00; Y10S165/228; Y10S165/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB379430A
Cited
US1861812A
Cited
US2215901A
Cited
US2158758A
Cited
US2144466A
Cited
US2401918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |