US2637530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange structure
Assignee: General Electric Co
•
Filing: 1950-04-04
•
Granted: 1953-05-05
•
Expires: 1970-04-04
Abstract
No abstract record available.
Inventors
- 👤 Alfred G Janos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:26
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/06; F25D23/061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB278195A
Cited
GB403899A
Cited
GB461421A
Cited
FR817136A
Cited
GB540678A
Cited
US2336733A
Cited
US2276811A
Cited
US2467191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |