US2805048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil structure for heat exchanger
Assignee: Individual
•
Filing: 1954-01-12
•
Granted: 1957-09-03
•
Expires: 1974-01-12
Abstract
No abstract record available.
Inventors
- 👤 Henry W Angelery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:49
CPC Classifications
F; F24; F24D; F24D1/00; F24D1/005; F28; F28D; F28D7/00; F28D7/02; F28D7/024; Y; Y10; Y10S; Y10S116/00; Y10S116/22; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/063; Y10S165/065; Y10S165/066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US916936A
Cited
US1526320A
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US1746158A
Cited
US1825433A
Cited
US1961202A
Cited
US2249074A
Cited
US2300634A
Cited
US2713994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |