US3519259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace jet devices
Assignee: L-Tec Co
•
Filing: 1968-05-06
•
Granted: 1970-07-07
•
Expires: 1988-05-06
Abstract
No abstract record available.
Inventors
- 👤 Frank S Death
- 👤 Walter B Farnsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:20
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1934379A
Cited
US2566040A
Cited
US2838105A
Cited
US3239205A
Cited
US3112194A
Cited
US3313535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |