US1851684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clarification plant
Assignee: Individual
•
Filing: 1929-01-24
•
Granted: 1932-03-29
•
Expires: 1949-01-24
Abstract
No abstract record available.
Inventors
- 👤 Pruss Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:07
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0018; B01D21/0039; B01D21/0042; B01D21/02; B01D21/04; B01D21/06; B01D21/10; B01D21/12; B01D21/14; B01D21/18; B01D21/24; B01D21/2405; B01D21/2427; B01D21/2433; B01D21/2438
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) | 1935-03-29 | 1935-09-28 | 1936-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-03-29 | 1939-09-28 | 1940-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-03-29 | 1943-09-28 | 1944-03-29 | $7700.00 | Window Closed / Lapsed |