US3204683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-fueled catalytic infra-red heat producing element
Assignee: Universal Oil Products Co
•
Filing: 1962-11-30
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Granted: 1965-09-07
•
Expires: 1982-11-30
Abstract
No abstract record available.
Inventors
- 👤 Richard J Ruff
- 👤 Truman J Hebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:36
CPC Classifications
F; F23; F23C; F23C99/00; F23D; F23D14/00; F23D14/12; F23D14/18; F23C2700/00; F23C2700/04; F23C2700/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE288442C
Cited
US2658742A
Cited
FR1108655A
Cited
US2921176A
Cited
FR1136829A
Cited
FR1175620A
Cited
US3040805A
Cited
US3155142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |