Patent US2984728A successfully refreshed from Google Patents.
US2984728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant heater
Assignee: Individual
•
Filing: 1958-05-21
•
Granted: 1961-05-16
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Expires: 1978-05-21
Abstract
No abstract record available.
Inventors
- 👤 Maxwell K Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:56
CPC Classifications
F; F24; F24C; F24C7/00; F24C7/04; F24C7/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2433137A
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US2445250A
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US2536648A
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US2770704A
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US2698893A
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US2707745A
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US2822456A
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US2781440A
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US2867710A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |