US2321185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange screw conveyer
Assignee: Individual
•
Filing: 1940-11-20
•
Granted: 1943-06-08
•
Expires: 1960-11-20
Abstract
No abstract record available.
Inventors
- 👤 Joseph D Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:13
CPC Classifications
B; B65; B65G; B65G33/00; B65G33/24; B65G33/26; B65G33/265; F; F28; F28F; F28F5/00; F28F5/06; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/147; Y10S165/148; Y10S165/149
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-06-07 | 1946-12-07 | 1947-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-06-07 | 1950-12-07 | 1951-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-06-07 | 1954-12-07 | 1955-06-08 | $7700.00 | Window Closed / Lapsed |