Patent US2610033A successfully refreshed from Google Patents.
US2610033A
Expired / Lapsed
US
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Heat exchange screw conveyer
Assignee: Rietz Manufacturing Co
•
Filing: 1946-10-22
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Granted: 1952-09-09
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Expires: 1966-10-22
Abstract
No abstract record available.
Inventors
- 👤 Carl A Rietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:57
CPC Classifications
F; F28; F28F; F28F5/00; F28F5/06; F28D; F28D11/00; F28D11/02; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/147; Y10S165/148; Y10S165/149
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |