Patent US3215620A successfully refreshed from Google Patents.
US3215620A
Expired / Lapsed
US
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Ion exchange of anionic surfactants
Assignee: General Mills Inc
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Filing: 1962-06-08
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Granted: 1965-11-02
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Expires: 1982-06-08
Abstract
No abstract record available.
Inventors
- 👤 Herbert N Dunning
- 👤 Maurice M Kreevoy
- 👤 James M White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:30
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/42; B; B01; B01J; B01J20/00; B01J20/22; C02; C02F; C02F1/00; C02F1/26; C02F1/42; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/28; C22B3/282; C22B3/288; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
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
Claim 2
Dependent Claim
141 words
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
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |