Patent US3888469A successfully refreshed from Google Patents.
Patent US3311569A successfully refreshed from Google Patents.
US3311569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making halogen modified poly (alkylene oxide) resins
Assignee: Union Carbide Corp
•
Filing: 1962-10-19
•
Granted: 1967-03-28
•
Expires: 1982-10-19
Abstract
No abstract record available.
Inventors
- 👤 Keith L Smith
- 👤 Alfred E Winslow
- 👤 Howard R Guest
- 👤 Ben W Kiff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:40
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/321; C08G65/325; C08G65/3255; B; B01; B01J; B01J8/00; B01J8/02; B01J8/06; C08G65/323; C08G65/3233
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR REDUCING THE REDUCED VISCOSITY OF A POLY(LOWER-ALKYLENE OXIDE) WHICH COMPRISES CONTACTING A FINELY DIVIDED, RESINOUS, POLY(LOWER-ALKYLENE OXIDE), SELECTED FROM THE GROUP CONSISTING OF POLY(ETHYLENE OXIDE) AND POLY(PROPYLENE OXIDE), WITH A DEGRADING AGENT, SELECTED FROM THE GROUP CONSISTING OF HALOGEN, ALKALI METAL HYPOCHLORITE, AND ALKALINE EARTH METAL HYPOCHLORITE, TO PRODUCE A SOLID POLY(LOWER-ALKYLENE OXIDE) HAVING A HALOGEN CONTENT OF FROM ABOUT 0.1 TO ABOUT 1.5 WEIGHT PERCENT, BASED ON THE WEIGHT OF SAID POLY(LOWER-ALKYLENE OXIDE), AND A REDUCED VISCOSITY OF AT LEAST 1 WHEN MEASURED AT A CONCETRATION OF 0.2 GRAM OF POLY(LOWER-ALKYLENE OXIDE) IN 100 MILLILITERS OF ACETONITRILE AT 30*C., SAID REDUCED VISCOSITY BEING LOWER THAN THAT OF THE STARTING POLY(LOWER-ALKYLENE OXIDE).
Claim 2
Dependent Claim
115 words
A PROCESS FOR REDUCING THE REDUCED VISCOSITY OF A POLY(LOWER-ALKYLENE OXIDE) WHICH COMPRISES CONTACTING A FINELY DIVIDED, RESINOUS, POLY(LOWER-ALKYLENE OXIDE), SELECTED FROM THE GROUP CONSISTING OF POLY(ETHYLENE OXIDE) AND POLY(PROPYLENE OXIDE), WITH A DEGRADING AGENT, SELECTED FROM THE GROUP CONSISTING OF HALOGEN, ALKALI METAL HYPOCHLORITE, AND ALKALINE EARTH METAL HYPOCHLORITE, TO PRODUCE A SOLID POLY(LOWER-ALKYLENE OXIDE) HAVING A HALOGEN CONTENT OF FROM ABOUT 0.1 TO ABOUT 1.5 WEIGHT PERCENT, BASED ON THE WEIGHT OF SAID POLY(LOWER-ALKYLENE OXIDE), AND A REDUCED VISCOSITY OF AT LEAST 1 WHEN MEASURED AT A CONCETRATION OF 0.2 GRAM OF POLY(LOWER-ALKYLENE OXIDE) IN 100 MILLILITERS OF ACETONITRILE AT 30*C., SAID REDUCED VISCOSITY BEING LOWER THAN THAT OF THE STARTING POLY(LOWER-ALKYLENE OXIDE).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |