US3407025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-catalytic infra-red heat producing unit
Assignee: Universal Oil Products Co
•
Filing: 1964-10-19
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Granted: 1968-10-22
•
Expires: 1984-10-19
Abstract
No abstract record available.
Inventors
- 👤 Leslie C Hardison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:42
CPC Classifications
F; F23; F23C; F23C99/00; F23D; F23D14/00; F23D14/12; F23D14/14; F23D14/145; F23D14/149; F23D14/18; F23C2700/00; F23C2700/04; F23C2700/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1956749A
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GB494087A
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US2658742A
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FR1108655A
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US3129749A
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FR1136829A
Cited
US3155142A
Cited
US3147960A
Cited
US3204683A
Cited
US3219025A
Cited
US3291187A
Cited
US3310098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |