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Patent US3509867A successfully refreshed from Google Patents.
US3509867A
Expired / Lapsed
US
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Radiant and convective heater
Assignee: Thermo Fisher Scientific Inc
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Filing: 1967-12-29
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Granted: 1970-05-05
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Expires: 1987-12-29
Abstract
No abstract record available.
Inventors
- 👤 Pierre J Brosens
- 👤 Dov Z Glucksman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:37
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/10; F24H3/105; F23; F23M; F23M9/00; F24C; F24C3/00; F24C3/002; F24C3/004; Y; Y10; Y10S; Y10S165/00; Y10S165/908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3124193A
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US1635379A
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US1735945A
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US1755727A
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US1862219A
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FR942360A
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US3187798A
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US3357471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |