US2539732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid and solids processing apparatus
Assignee: Individual
•
Filing: 1945-10-08
•
Granted: 1951-01-30
•
Expires: 1965-10-08
Abstract
No abstract record available.
Inventors
- 👤 William J Donohue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:09
CPC Classifications
B; B01; B01J; B01J16/00; B01J19/00; B01J19/18; B01J19/1862; D; D21; D21C; D21C11/00; D21C11/0064; B01J2219/00; B01J2219/00049; B01J2219/00164; Y; Y10; Y10S; Y10S423/00; Y10S423/03
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) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |