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US3459309A
Expired / Lapsed
US
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Cooling water purification apparatus
Assignee: Goeckel Maschf G GmbH
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Filing: 1965-09-13
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Granted: 1969-08-05
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Expires: 1985-09-13
Abstract
No abstract record available.
Inventors
- 👤 Philipp Eckstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:35
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/24; B01D21/245; B01D21/2455
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1915733A
Cited
US2652928A
Cited
US2759606A
Cited
US3087620A
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US3197030A
Cited
US3140961A
Cited
US3273494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |