Patent US2933697A successfully refreshed from Google Patents.
US3494599A
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US
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Portable forced-air heater
Assignee: SCHEU PRODUCTS CO
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Filing: 1967-10-06
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Granted: 1970-02-10
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Expires: 1987-10-06
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Stupak Jr
- 👤 Howard B Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:48
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/2064; F24H9/2085; F23; F23D; F23D11/00; F23D11/10; F24H15/00; F24H15/10; F24H15/128; F24H15/20; F24H15/25; F24H15/30; F24H15/305; F24H15/31; F24H15/355; F24H15/36; F24H15/395; F24H9/18; F24H9/1854; F24H9/1877; F24H9/1881; F24H9/25
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3126198A
Cited
US3050111A
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US3114538A
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US3210059A
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US3306335A
Cited
US3319947A
Cited
US3314411A
Cited
US3338287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |