Patent US1673685A successfully refreshed from Google Patents.
US1673685A
Expired / Lapsed
US
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Method of and apparatus for treating solutions and products
Assignee: Uniroyal Chemical Co Inc
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Filing: 1927-06-15
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Granted: 1928-06-12
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Expires: 1947-06-15
Abstract
No abstract record available.
Inventors
- 👤 William S Johnston
- 👤 Alexis W Keen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:17
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/14
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) | 1931-06-12 | 1931-12-12 | 1932-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-06-12 | 1935-12-12 | 1936-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-06-12 | 1939-12-12 | 1940-06-12 | $7700.00 | Window Closed / Lapsed |