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Patent US1673572A successfully refreshed from Google Patents.
US1673572A
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Assignee: CENTRAL UNION TRUST Co
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Filing: 1926-04-28
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Granted: 1928-06-12
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Expires: 1946-04-28
Abstract
No abstract record available.
Inventors
- 👤 Robert P F Liddell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:31
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/16; B01D25/00; B01D25/02; B01D25/12; B01D25/19; B01D29/00; B01D29/39; B01D29/41; B01D29/62; B01D29/64; B01D29/6469; B01D29/6476
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 |