US2607567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Individual
•
Filing: 1944-11-24
•
Granted: 1952-08-19
•
Expires: 1964-11-24
Abstract
No abstract record available.
Inventors
- 👤 James C Hobbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:55
CPC Classifications
F; F28; F28B; F28B1/00; F28B1/02; F28D; F28D7/00; F28D7/06; F28D7/16; F28D7/1607; F28F; F28F9/00; F28F9/02; F28F9/0219; F28F9/0236; F28F9/22; F28F2009/222; F28F2009/226; F28F2230/00; F28F2275/00; F28F2275/20; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/402
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US596874A
Cited
US745312A
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US1335506A
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FR514024A
Cited
US1770208A
Cited
US1633975A
Cited
US1882474A
Cited
US1994779A
Cited
US2102723A
Cited
US2232936A
Cited
US2363526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |