US3402137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing aqueous polymer solutions
Assignee: Union Oil Company of California
•
Filing: 1966-02-01
•
Granted: 1968-09-17
•
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 00:23
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2486804A
Cited
US2883298A
Cited
US3092600A
Cited
US3087920A
Cited
US3152102A
Cited
US3216962A
Cited
US3234163A
Cited
US3249572A
Cited
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 |