Patent US2780708A successfully refreshed from Google Patents.
US2780708A
Expired / Lapsed
US
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Electric resistance heater
Assignee: Blue Ridge Glass Corp
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Filing: 1953-06-23
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Granted: 1957-02-05
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Expires: 1973-06-23
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Glynn
- 👤 Jr Jack Samuel Storm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:08
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/84; F; F24; F24D; F24D13/00; F24D13/02; H05B2203/00; H05B2203/002; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1543970A
Cited
US1771273A
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US2503457A
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US2631219A
Cited
US2641675A
Cited
US2623971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |