US2921774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heaters for petroleum fluids
Assignee: Cameron Solutions Inc
•
Filing: 1957-02-18
•
Granted: 1960-01-19
•
Expires: 1977-02-18
Abstract
No abstract record available.
Inventors
- 👤 Clarence O Glasgow
- 👤 Jr Alex W Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:00
CPC Classifications
F; F28; F28G; F28G5/00; C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20; F22; F22B; F22B1/00; F22B1/02; F22B1/08
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) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |