US2234753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange apparatus
Assignee: YORK ICE MACHINERY Corp
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Filing: 1932-10-24
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Granted: 1941-03-11
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Expires: 1952-10-24
Abstract
No abstract record available.
Inventors
- 👤 James S Frazer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:17
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/003; F24; F24F; F24F1/00; F24F1/02; F24F1/022; F24F1/04; F24F13/00; F24F13/22; F24F13/222; F24F6/00; F24F6/12; F25D15/00; F25D21/00; F25D21/14; F24F2013/225
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) | 1944-03-10 | 1944-09-09 | 1945-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-03-10 | 1948-09-09 | 1949-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-03-10 | 1952-09-09 | 1953-03-11 | $7700.00 | Window Closed / Lapsed |