Patent US1668136A successfully refreshed from Google Patents.
US1668136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of emulsions
Assignee: Individual
•
Filing: 1923-03-12
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Granted: 1928-05-01
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Expires: 1943-03-12
Abstract
No abstract record available.
Inventors
- 👤 Agthe Carl Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:27
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/40; B01F23/41
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) | 1931-05-01 | 1931-10-31 | 1932-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-05-01 | 1935-10-31 | 1936-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-05-01 | 1939-10-31 | 1940-05-01 | $7700.00 | Window Closed / Lapsed |