Patent US3730070A successfully refreshed from Google Patents.
US3730070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rear window defroster
Assignee: Individual
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Filing: 1971-06-04
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Granted: 1973-05-01
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Expires: 1991-06-04
Abstract
Abstract A wind driven rear window defroster adapted to be mounted in the side window space of a vehicle so as to circulate and direct warm air from the interior of the car onto the rear window for defrosting purposes, the circulating fan being driven by a wind driven fan outside the vehicle.
Inventors
- 👤 R Pedersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:43
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00457; B60H1/00471
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A rear window defroster for a passenger car comprising a wind driven turbine fan carried outside the car on a transparent panel adapted to be secured to the top of a partially rolled down side window in the car; said transparent panel comprisiNg a clear plastic window insert shaped to fit the opening in the car produced by partly lowering the side window in the car, said insert having a slot on its bottom edge sized to accept the top of the car window; said turbine being connected to drive a window defrosting squirrel cage fan carried inside said car on said transparent panel, said wind driven fan and said defrosting fan being connected together by a shaft through said transparent panel and further including a wind channeling shroud surrounding said wind driven turbine fan to direct wind flow thereacross and a second shroud surrounding said defrosting fan shaped to gather warm air inside the car and direct it to the rear window.
Claim 2
Dependent Claim
163 words
A rear window defroster for a passenger car comprising a wind driven turbine fan carried outside the car on a transparent panel adapted to be secured to the top of a partially rolled down side window in the car; said transparent panel comprisiNg a clear plastic window insert shaped to fit the opening in the car produced by partly lowering the side window in the car, said insert having a slot on its bottom edge sized to accept the top of the car window; said turbine being connected to drive a window defrosting squirrel cage fan carried inside said car on said transparent panel, said wind driven fan and said defrosting fan being connected together by a shaft through said transparent panel and further including a wind channeling shroud surrounding said wind driven turbine fan to direct wind flow thereacross and a second shroud surrounding said defrosting fan shaped to gather warm air inside the car and direct it to the rear window.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |