US2580149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control means for heat exchange apparatus
Assignee: Standard Thomson Corp
•
Filing: 1948-02-27
•
Granted: 1951-12-25
•
Expires: 1968-02-27
Abstract
No abstract record available.
Inventors
- 👤 John E Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:16
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1189786A
Cited
US1459318A
Cited
DE510960C
Cited
GB554663A
Cited
GB554728A
Cited
US2437287A
Cited
GB587421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |