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US1456934A
Expired / Lapsed
US
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Method and apparatus for separating materials
Assignee: Individual
•
Filing: 1920-10-16
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Granted: 1923-05-29
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Expires: 1940-10-16
Abstract
No abstract record available.
Inventors
- 👤 Rice John Ainsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:06
CPC Classifications
B; B04; B04B; B04B1/00
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) | 1926-05-28 | 1926-11-27 | 1927-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-05-28 | 1930-11-27 | 1931-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-05-28 | 1934-11-27 | 1935-05-29 | $7700.00 | Window Closed / Lapsed |