US3463139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas infrared burner
Assignee: Individual
•
Filing: 1967-10-10
•
Granted: 1969-08-26
•
Expires: 1987-10-10
Abstract
No abstract record available.
Inventors
- 👤 Kanekichi Hayashi
- 👤 Susumu Naito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:50
CPC Classifications
F; F23; F23C; F23C99/00; F24; F24C; F24C3/00; F24C3/04; F24C3/047; F24C3/08; F24C3/085; F23C2700/00; F23C2700/04; F23C2700/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2870828A
Cited
US2921176A
Cited
US2898846A
Cited
US3241542A
Cited
US3267924A
Cited
US3369536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |