US2905647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of oxetane polymers
Assignee: Hercules Powder Co
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Filing: 1956-08-27
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Granted: 1959-09-22
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Expires: 1976-08-27
Abstract
No abstract record available.
Inventors
- 👤 Robert F Goddu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:26
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/16; C08G65/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN THE METHOD OF POLYMERIZING 3,3-BIS(CHLOROMETHYL)OXETANE TO A POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 10,000, THE IMPROVEMENT WHICH CONSISTS ESSENTIALLY IN COMBINATION SUBJECTING 3,3-BIS(CHLOROMETHYL) OXETANE TO A TEMPERATURE OF BETWEEN 160 AND 300* C., ENCE OF ALUMINUM CHLORIDE, SAID ALUMINUM CHLORIDE BEING PRESENT IN AN AMOUNT OF NOT MORE THAN ABOUT 500 P.P.M. BY WEIGHT OF SAID OXETANE.
Claim 2
Dependent Claim
60 words
IN THE METHOD OF POLYMERIZING 3,3-BIS(CHLOROMETHYL)OXETANE TO A POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 10,000, THE IMPROVEMENT WHICH CONSISTS ESSENTIALLY IN COMBINATION SUBJECTING 3,3-BIS(CHLOROMETHYL) OXETANE TO A TEMPERATURE OF BETWEEN 160 AND 300* C., ENCE OF ALUMINUM CHLORIDE, SAID ALUMINUM CHLORIDE BEING PRESENT IN AN AMOUNT OF NOT MORE THAN ABOUT 500 P.P.M. BY WEIGHT OF SAID OXETANE.
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) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |