Patent US2331718A successfully refreshed from Google Patents.
US2331718A
Expired / Lapsed
US
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Heating system
Assignee: Honeywell Inc
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Filing: 1940-12-13
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Granted: 1943-10-12
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Expires: 1960-12-13
Abstract
No abstract record available.
Inventors
- 👤 Alwin B Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:49
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H15/00; F24H15/20; F24H15/212; F24H15/223; F24H15/30; F24H15/305; F24H15/31; F24H15/355; F24H15/36; F24H6/00
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) | 1946-10-11 | 1947-04-12 | 1947-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-11 | 1951-04-12 | 1951-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-11 | 1955-04-12 | 1955-10-12 | $7700.00 | Window Closed / Lapsed |