US2921176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas electric heating device
Assignee: Lanteris Space LLC
•
Filing: 1955-03-01
•
Granted: 1960-01-12
•
Expires: 1975-03-01
Abstract
No abstract record available.
Inventors
- 👤 Donald W Scofield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:35
CPC Classifications
F; F24; F24C; F24C1/00; F24C1/02; F24C1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2042690A
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US2493266A
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Cited
US2570554A
Cited
US2487753A
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US2487754A
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US2658742A
Cited
DE903986C
Cited
US2803295A
Cited
US2847988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |