Patent US2902919A successfully refreshed from Google Patents.
US2902919A
Expired / Lapsed
US
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Baseboard diffuser
Assignee: HART AND COOLEY Manufacturing CO
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Filing: 1956-02-16
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Granted: 1959-09-08
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Expires: 1976-02-16
Abstract
No abstract record available.
Inventors
- 👤 Robert J Waalkes
- 👤 Alfred E Kietzmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:06
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/072; F24F13/08; F24F13/10; F24F13/14; F24F13/1426
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1704661A
Cited
US2281615A
Cited
US2516871A
Cited
US2656781A
Cited
US2660946A
Cited
US2766676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |