US2833483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colloid mill
Assignee: Individual
•
Filing: 1955-01-21
•
Granted: 1958-05-06
•
Expires: 1975-01-21
Abstract
No abstract record available.
Inventors
- 👤 Frederick J E China
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:51
CPC Classifications
B; B02; B02C; B02C7/00; B02C7/02; B02C7/08; B02C7/11; B02C7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US185200A
Cited
US203127A
Cited
US218884A
Cited
US2156320A
Cited
US2204140A
Cited
US2377307A
Cited
US2556641A
Cited
US2610801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |