US2595822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring seal for tube and shell heat exchangers
Assignee: Young Radiator Co
•
Filing: 1949-10-25
•
Granted: 1952-05-06
•
Expires: 1969-10-25
Abstract
No abstract record available.
Inventors
- 👤 Uggerby William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:43
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/22; F28D; F28D7/00; F28D7/16; F28D7/1607; F28F9/02; F28F9/0219; F28F2230/00; F28F2275/00; F28F2275/20; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/416; Y10S165/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1689910A
Cited
US1822698A
Cited
US2024209A
Cited
GB530357A
Cited
US2376505A
Cited
US2469785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |