Patent US3547725A successfully refreshed from Google Patents.
US3547725A
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Method of fabricating an electrical resistance heating pad
Assignee: Lockheed Martin Corp
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Filing: 1968-06-11
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Granted: 1970-12-15
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Expires: 1988-06-11
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
2026-11-01 19:43
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/34; H05B3/342; H05B3/36; H05B2203/00; H05B2203/002; H05B2203/003; H05B2203/013; H05B2203/017; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2942330A
Cited
US2870277A
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US3146145A
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US3263307A
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US3215574A
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US3366519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |