US2628077A
Expired / Lapsed
US
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Method of effecting indirect heat transfer
Assignee: New Jersey Zinc Co
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Filing: 1949-05-17
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Granted: 1953-02-10
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Expires: 1969-05-17
Abstract
No abstract record available.
Inventors
- 👤 Erwin C Handwerk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:03
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/10; B; B01; B01J; B01J8/00; B01J8/08; B01J8/10; F; F26; F26B; F26B17/00; F26B17/18; F26B17/20; F26B3/00; F26B3/18; F26B3/22; B01J2219/00; B01J2219/18; B01J2219/182; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |