US3135705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric epoxides
Assignee: Hercules Powder Co
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Filing: 1959-05-11
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Granted: 1964-06-02
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Expires: 1979-05-11
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Vandenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:52
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/12; Y; Y10; Y10S; Y10S260/00; Y10S260/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE PROCESS OF PREPARING POLY(EPOXIDES) WHICH COMPRISES POLYMERIZING EPOXIDES, WHEREIN THE EPOXY GROUP IS AN OXIRANE RING, BY CONTACTING AT LEAST ONE OF SAID EPOXIDES WITH THE CATALYST FORMED BY REACTING AN ORGANOALUMINUM COMPOUND CONTAINING AT LEAST ONE ALUMINUMTO-CARBON BOND WITH WATER IN AN AMOUNT SUCH THAT THE MOLAR RATIO OF WATER TO ORGANOALUMINUM COMPOUNDS IS WITHIN THE RANGE OF FROM ABOUT 0.1 TO ABOUT 1.5 AND IS LOWER THAN THE NUMBER OF ALUMINUM-TO-CARBON BONDS IN THE SAID ORGANOALUMINUM COMPOUND, SAID EPOXIDES BEING FREE OF GROUPS OTHER THAN OXIRANE GROUPS WHICH ARE REACTIVE WITH SAID ORGANOALUMINUM COMPOUND.
Claim 2
Dependent Claim
97 words
THE PROCESS OF PREPARING POLY(EPOXIDES) WHICH COMPRISES POLYMERIZING EPOXIDES, WHEREIN THE EPOXY GROUP IS AN OXIRANE RING, BY CONTACTING AT LEAST ONE OF SAID EPOXIDES WITH THE CATALYST FORMED BY REACTING AN ORGANOALUMINUM COMPOUND CONTAINING AT LEAST ONE ALUMINUMTO-CARBON BOND WITH WATER IN AN AMOUNT SUCH THAT THE MOLAR RATIO OF WATER TO ORGANOALUMINUM COMPOUNDS IS WITHIN THE RANGE OF FROM ABOUT 0.1 TO ABOUT 1.5 AND IS LOWER THAN THE NUMBER OF ALUMINUM-TO-CARBON BONDS IN THE SAID ORGANOALUMINUM COMPOUND, SAID EPOXIDES BEING FREE OF GROUPS OTHER THAN OXIRANE GROUPS WHICH ARE REACTIVE WITH SAID ORGANOALUMINUM COMPOUND.
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |