US2520320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for winning kaolin and the like
Assignee: Georgia Kaolin Co
•
Filing: 1945-09-27
•
Granted: 1950-08-29
•
Expires: 1965-09-27
Abstract
No abstract record available.
Inventors
- 👤 Sanford C Lyons
- 👤 Erwin G Dallmus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:46
CPC Classifications
E; E21; E21C; E21C47/00; E21C47/10; B; B28; B28C; B28C1/00; B28C1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US449102A
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US550051A
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US594240A
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US1083558A
Cited
GB128333A
Cited
US1431422A
Cited
US1753804A
Cited
US2173975A
Cited
US2375689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |