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Patent US2435975A successfully refreshed from Google Patents.
US2435975A
Expired / Lapsed
US
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Fluid conditioning tank containing conditioning material and a receptacle therewithin containing different conditioning material
Assignee: Individual
•
Filing: 1942-12-07
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Granted: 1948-02-17
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Expires: 1962-12-07
Abstract
No abstract record available.
Inventors
- 👤 Chester T Mcgill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:26
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2304109A
Cited
US489084A
Cited
US522819A
Cited
US1483858A
Cited
US355005A
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US628884A
Cited
US636356A
Cited
US632091A
Cited
US1457503A
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US1541921A
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US1685816A
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US1694332A
Cited
US1719548A
Cited
US1697835A
Cited
US1703451A
Cited
US1704051A
Cited
US1698890A
Cited
US1929405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-16 | 1951-08-18 | 1952-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-16 | 1955-08-18 | 1956-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-16 | 1959-08-18 | 1960-02-17 | $7700.00 | Window Closed / Lapsed |