Patent US3397460A successfully refreshed from Google Patents.
US3397460A
Expired / Lapsed
US
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Heat exchange system for calciner
Assignee: INTERNAT PROCESSES Ltd
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Filing: 1965-10-12
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Granted: 1968-08-20
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Expires: 1985-10-12
Abstract
No abstract record available.
Inventors
- 👤 Hall Richard Terry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:27
CPC Classifications
B; B01; B01J; B01J6/00; B01J6/001; F; F27; F27D; F27D15/00; F27D15/02; F27D15/0286; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/14; F28D; F28D7/00; F28D7/08; Y; Y10; Y10S; Y10S165/00; Y10S165/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1903650A
Cited
US1833666A
Cited
US2276496A
Cited
US2960323A
Cited
US2911198A
Cited
US3176969A
Cited
US3274701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |