US2673719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam heat exchanger
Assignee: Honeywell Inc
•
Filing: 1950-01-13
•
Granted: 1954-03-30
•
Expires: 1970-01-13
Abstract
No abstract record available.
Inventors
- 👤 Walter A Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:57
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/08; F28; F28F; F28F9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR665776A
Cited
US511161A
Cited
US2007036A
Cited
US1119415A
Cited
US1681725A
Cited
US1940152A
Cited
US2041282A
Cited
US2137804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |