US2993489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overhead heating unit
Assignee: UNION CHILL MAT CO
•
Filing: 1956-07-11
•
Granted: 1961-07-25
•
Expires: 1976-07-11
Abstract
No abstract record available.
Inventors
- 👤 Harrison D Sterick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:07
CPC Classifications
F; F23; F23C; F23C99/00; F24; F24C; F24C3/00; F24C3/04; F24C3/042; F23C2700/00; F23C2700/04; F23C2700/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE515545A
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US421941A
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GB190710849A
Cited
GB454328A
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US2051213A
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GB520940A
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GB621611A
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US2822799A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |