US2873097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Additional air supply for radiators
Assignee: Individual
•
Filing: 1956-06-12
•
Granted: 1959-02-10
•
Expires: 1976-06-12
Abstract
No abstract record available.
Inventors
- 👤 Brandi Otto Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:31
CPC Classifications
F; F24; F24F; F24F1/00; F24F13/00; F24F13/26; F28; F28D; F28D1/00; F28D1/02; F28D1/0233; F28D1/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1941425A
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US2022332A
Cited
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US2267425A
Cited
US2287267A
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CH225952A
Cited
US2566929A
Cited
US2697428A
Cited
US2774574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |