US3549088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrothermal furnace control
Assignee: Texas Instruments Inc
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Filing: 1969-05-08
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Granted: 1970-12-22
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Expires: 1989-05-08
Abstract
No abstract record available.
Inventors
- 👤 Robert E Obenhaus
- 👤 David J Squiers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:32
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/20; F23N5/203; F23N5/02; F23N5/14; F23N5/143; G; G05; G05D; G05D23/00; G05D23/19; G05D23/30; G05D23/303; F23N2225/00; F23N2225/08; F23N2227/00; F23N2227/04; F23N2227/28; F23N2231/00; F23N2231/12; F23N2233/00; F23N2233/06; F23N2239/00; F23N2239/04; F23N5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |