US2826565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a void-free thermosetting casting from liquid polybutadiene
Assignee: Phillips Petroleum Co
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Filing: 1955-01-20
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Granted: 1958-03-11
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Expires: 1975-01-20
Abstract
No abstract record available.
Inventors
- 👤 Willie W Crouch
- 👤 Jr James T Edmonds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:11
CPC Classifications
C; C08; C08J; C08J5/00; C08J2309/00; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD FOR PREPARING VOID-FREE CASTINGS FROM A SOLVENT FREE LIQUID POLYMER PREPARED BY POLYMERIZING MONOMERIC MATERIAL COMPRISED OF AT LEAST 50 WEIGHT PERCENT CONJUGATED DIENE WHICH COMPRISES REMOVING 0.5 TO 10 WEIGHT PERCENT OF SAID LIQUIDPOLYMER BY PASSING AN INERT GAS THROUGH SAID LIQUID POLYMER, CASTING THE REMAINING STRIPPED POLYMER INTO SUITABLE MOLDS, AND HEATING THE THUS CAST MATERIAL UNTIL SOLIDIFIED.
Claim 2
Independent Claim
62 words
A METHOD FOR PREPARING VOID-FREE CASTINGS FROM A SOLVENT FREE LIQUID POLYMER PREPARED BY POLYMERIZING MONOMERIC MATERIAL COMPRISED OF AT LEAST 50 WEIGHT PERCENT CONJUGATED DIENE WHICH COMPRISES REMOVING 0.5 TO 10 WEIGHT PERCENT OF SAID LIQUIDPOLYMER BY PASSING AN INERT GAS THROUGH SAID LIQUID POLYMER, CASTING THE REMAINING STRIPPED POLYMER INTO SUITABLE MOLDS, AND HEATING THE THUS CAST MATERIAL UNTIL SOLIDIFIED.
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) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |