Patent US3439150A successfully refreshed from Google Patents.
US3439150A
Expired / Lapsed
US
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Heating device having a specially positioned control thermostat therein
Assignee: ROBERT M WELLS
•
Filing: 1966-08-30
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Granted: 1969-04-15
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Expires: 1986-08-30
Abstract
No abstract record available.
Inventors
- 👤 Alton R Wells
- 👤 Robert M Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:36
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/46; H05B3/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1848449A
Cited
US1995355A
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US2789201A
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US2817068A
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US2864929A
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US2907860A
Cited
US2955185A
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US2888547A
Cited
US3303327A
Cited
US3277277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |