US3418072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing ion exchangers
Assignee: D'ETUDES DE RECHERCHES ET D'APPLICATIONS POUR I'INDUSTRIE Ste
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Filing: 1964-06-19
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Granted: 1968-12-24
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Expires: 1984-06-19
Abstract
No abstract record available.
Inventors
- 👤 Piret Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:43
CPC Classifications
C; C01; C01G; C01G39/00; B; B01; B01J; B01J39/00; B01J39/08; B01J39/09; B01J39/12; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/37; C01B25/372; C01G30/00; C01G41/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |