US3423574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistance heating pad
Assignee: Lockheed Martin Corp
•
Filing: 1965-10-14
•
Granted: 1969-01-21
•
Expires: 1985-10-14
Abstract
No abstract record available.
Inventors
- 👤 George J Shomphe
- 👤 Robert W Tabor
- 👤 Harold W Lalmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:46
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/34; H05B3/36; H05B3/342; H05B2203/00; H05B2203/002; H05B2203/003; H05B2203/013; H05B2203/017
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US888381A
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US1549984A
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US2114396A
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US2302820A
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US2719213A
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US2715674A
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US2712591A
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US2745942A
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US2703352A
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US2873352A
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US3168632A
Cited
US3263307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |