Patent US2980785A successfully refreshed from Google Patents.
US2980785A
Expired / Lapsed
US
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Electric heating
Assignee: NICHOLAS E WHITNEY SR
•
Filing: 1959-03-30
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Granted: 1961-04-18
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Expires: 1979-03-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Nicholas E Whitney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:37
CPC Classifications
F; F24; F24D; F24D5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1560377A
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US2022453A
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US2438670A
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US2568278A
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US2660407A
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US2712053A
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US2683796A
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US2712588A
Cited
US2819375A
Cited
US2839659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |