US1987182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Svenska AB Gasaccumulator
•
Filing: 1932-05-24
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Granted: 1935-01-08
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Expires: 1952-05-24
Abstract
No abstract record available.
Inventors
- 👤 Dalen Gustaf
- 👤 Bjorklund Gustaf Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:34
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/0206; F28D1/0213; F24; F24H; F24H1/00; F24H1/0009; F24H1/18; F24H1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-01-07 | 1938-07-09 | 1939-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-01-07 | 1942-07-09 | 1943-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-01-07 | 1946-07-09 | 1947-01-08 | $7700.00 | Window Closed / Lapsed |