Patent US3402137A successfully refreshed from Google Patents.
US3402137A
Expired / Lapsed
US
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Method of preparing aqueous polymer solutions
Assignee: Union Oil Company of California
•
Filing: 1966-02-01
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Granted: 1968-09-17
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Expires: 1986-02-01
Abstract
No abstract record available.
Inventors
- 👤 Paul W Fischer
- 👤 Julius P Gallus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:40
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C02; C02F; C02F1/00; C02F1/52; C02F1/5227; C08K5/092; Y; Y10; Y10S; Y10S507/00; Y10S507/922; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2486804A
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US2883298A
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US3092600A
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US3087920A
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US3152102A
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US3216962A
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US3234163A
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US3249572A
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US3251814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |