US2857499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infra-red heating panel
Assignee: Syntron Co
•
Filing: 1955-09-19
•
Granted: 1958-10-21
•
Expires: 1975-09-19
Abstract
No abstract record available.
Inventors
- 👤 Fearn Richard Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:12
CPC Classifications
F; F24; F24D; F24D13/00; F24D13/02; F24D13/022; H; H05; H05B; H05B3/00; H05B3/10; H05B3/16; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1150426A
Cited
US1504208A
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US1949450A
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US2255518A
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US2489190A
Cited
US2580111A
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US2742556A
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US2694741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |