US2356919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat interchange apparatus
Assignee: Morris Motors Ltd
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Filing: 1943-04-06
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Granted: 1944-08-29
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Expires: 1963-04-06
Abstract
No abstract record available.
Inventors
- 👤 Dono George Edward
- 👤 Goddard Ronald Harbridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:27
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0202; F28F9/0204; F28F9/0209; F28F9/0212
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-08-29 | 1948-02-28 | 1948-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-08-29 | 1952-02-28 | 1952-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-08-29 | 1956-02-28 | 1956-08-29 | $7700.00 | Window Closed / Lapsed |