US1920515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange containers and batteries thereof
Assignee: Individual
•
Filing: 1932-08-27
•
Granted: 1933-08-01
•
Expires: 1952-08-27
Abstract
No abstract record available.
Inventors
- 👤 John E Marsden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:43
CPC Classifications
B; B65; B65D; B65D21/00; B65D21/02; B65D21/0201; B65D21/0202; F; F25; F25D; F25D25/00; F25D25/005; F25D2331/00; F25D2331/80; F25D2331/803
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) | 1936-07-31 | 1937-01-30 | 1937-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-07-31 | 1941-01-30 | 1941-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-07-31 | 1945-01-30 | 1945-08-01 | $7700.00 | Window Closed / Lapsed |