US2903862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer and conversion system
Assignee: Individual
•
Filing: 1955-12-12
•
Granted: 1959-09-15
•
Expires: 1975-12-12
Abstract
No abstract record available.
Inventors
- 👤 Philias J Bouchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:15
CPC Classifications
F; F25; F25B; F25B30/00; F25B30/02; F25B9/00; F25B9/002; F25B9/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US224785A
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US231886A
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CH88274A
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US1916242A
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US2030509A
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US2124289A
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US2143895A
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US2446411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |