Patent US2876690A successfully refreshed from Google Patents.
US2876690A
Expired / Lapsed
US
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Heating, cooling and ventilating system
Assignee: Vulcan Radiator Co
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Filing: 1955-01-11
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Granted: 1959-03-10
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Expires: 1975-01-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph D Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:37
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/0233; F28D1/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB379430A
Cited
US1995667A
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US2158758A
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US2144466A
Cited
US2345537A
Cited
US2662747A
Cited
US2711681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |