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US3479490A
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High temperature infrared radiant heating device
Assignee: NORMAN H STARK
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Filing: 1969-02-06
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Granted: 1969-11-18
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Expires: 1989-02-06
Abstract
No abstract record available.
Inventors
- 👤 Norman H Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:32
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/28; H05B3/283; H05B2203/00; H05B2203/032
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1742159A
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US2138217A
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US2619580A
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US2710909A
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US2952761A
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US2932711A
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US3031739A
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US3155814A
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US3277273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |