Patent US2413375A successfully refreshed from Google Patents.
US2413375A
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Method of and apparatus for treating liquids
Assignee: DARWIN KIRSCHMAN H
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Filing: 1943-05-22
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Granted: 1946-12-31
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Expires: 1963-05-22
Abstract
No abstract record available.
Inventors
- 👤 Richard D Pomeroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:01
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5281; B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/041; B01D17/047; B01D21/00; B01D21/0018; B01D21/0039; B01D21/0054; B01D21/0066; B01D21/02; B01D21/08; B01D21/24; B01D21/2427
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) | 1949-12-30 | 1950-07-01 | 1950-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-12-30 | 1954-07-01 | 1954-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-12-30 | 1958-07-01 | 1958-12-31 | $7700.00 | Window Closed / Lapsed |