Patent US2710909A successfully refreshed from Google Patents.
US2710909A
Expired / Lapsed
US
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Electric heating element
Assignee: Individual
•
Filing: 1953-11-16
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Granted: 1955-06-14
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Expires: 1973-11-16
Abstract
No abstract record available.
Inventors
- 👤 Richard W Logan
- 👤 Benjamin C Liebenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:02
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/54; H05B3/56; H05B3/565; B; B29; B29C; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/433; B29C66/45; B29C66/70; B29C66/71; B29C66/72; B29C66/723; B29C66/7232; B29C66/72324; B29C66/72326; B29C66/729; B29C66/7292; B29C66/73; B29C66/737; B29C66/7375; B29C66/73751; B29C66/73752; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B29C70/00; B29C70/68; B29C70/685; B29C70/687; B29C65/00; B29C65/02; B29C66/731; B29C66/7314; B29C66/73143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1385527A
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US2386095A
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US2559077A
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US2511540A
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US2503457A
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US2548468A
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US2585443A
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US2610286A
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US2643206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-13 | 1958-12-13 | 1959-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-13 | 1962-12-13 | 1963-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-13 | 1966-12-13 | 1967-06-14 | $7700.00 | Window Closed / Lapsed |