US1753641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of breaking emulsions
Assignee: Individual
•
Filing: 1925-12-21
•
Granted: 1930-04-08
•
Expires: 1945-12-21
Abstract
No abstract record available.
Inventors
- 👤 John W Beckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:52
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; C; C10; C10G; C10G33/00; C10G33/04
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) | 1933-04-07 | 1933-10-07 | 1934-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-07 | 1937-10-07 | 1938-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-07 | 1941-10-07 | 1942-04-08 | $7700.00 | Window Closed / Lapsed |