US3409691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous cation exchange resins as selective sorbents in organic systems
Assignee: Dow Chemical Co
•
Filing: 1966-02-01
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Granted: 1968-11-05
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Expires: 1986-02-01
Abstract
No abstract record available.
Inventors
- 👤 Small Hamish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:58
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02; B; B01; B01D; B01D15/00; B01D15/08; B01D15/26; B01D15/36; B01D15/361; B01D15/362; B01J; B01J39/00; B01J39/04; B01J47/00; B01J47/014; C07; C07C; C07C7/00; C07C7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2865970A
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US3122456A
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US3037052A
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US3026362A
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US3201357A
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US3315002A
Cited
US3219717A
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US3282831A
Cited
US3284531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |