US3555006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysaccharide polymer cyclic ketals
Assignee: ExxonMobil Upstream Research Co
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Filing: 1967-06-15
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Granted: 1971-01-12
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Expires: 1987-06-15
Abstract
Abstract LONG CHAIN WATER-SOLUBLE ORGANIC POLYMERS HAVING HYDROXYL GROUPS LOCATED AT B POSITIONS WITH RESPECT TO ONE ANOTHER ARE REACTD WITH A-KETO CARBOXYLIC ACIDS NDER AQUEOUS CONDITIONS TO FORM MODIFIED POLYMERS USEFUL IN THE PREPARATION OF OILFIELD DRILLING FLUIDS AND SIMILAR CONPOSITIONS.
Inventors
- 👤 Stanley J Storfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:21
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0087; C08B37/0006; C08B37/0024; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/206; Y; Y10; Y10S; Y10S507/00; Y10S507/925
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |