US3514581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optically transparent electrical heating element
Assignee: Gulton Industries Inc
•
Filing: 1968-05-29
•
Granted: 1970-05-26
•
Expires: 1988-05-29
Abstract
No abstract record available.
Inventors
- 👤 Martin G Rocholl
- 👤 Ilse Rocholl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:16
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/84; H05B3/86; H05B3/10; H05B3/12; H05B3/14; H05B2203/00; H05B2203/013; Y; Y10; Y10S; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2441831A
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US2389360A
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US2543363A
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US2739083A
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US2879367A
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US3020376A
Cited
US3177345A
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US3296641A
Cited
US3419702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |