Patent US2844562A successfully refreshed from Google Patents.
US2844562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of mixing resinous polymeric styrene with a rubbery butadiene polymer
Assignee: Individual
•
Filing: 1955-05-16
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Granted: 1958-07-22
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Expires: 1975-05-16
Abstract
No abstract record available.
Inventors
- 👤 Alvin R Ingram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:13
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
METHOD OF MAKING THERMOPLASTIC COMPOSITIONS CONTAINING A RESINOUS POLYMERIC STYRENE AND A RUBBERY POLYMERIC BUTADIENE WHICH COMPRISES BLENDING 75 TO 97 WEIGHT PARTS OF A RESINOUS POLYMERIC STYRENE WITH 25 TO 3 WEIGHT PARTS OF A RUBBERY POLYMERIC BUTADIENE IN THE PRESENCE OF A METAL PEROXIDE OF THE GROUP CONSISTING OF MGO2, CAO2, ZNO2, SRO2, BAO2, PBO2 AND MIXTURES THEREOF IN AMOUNTS FROM ABOUT 0.03 TO 0.15 WEIGHT PARTS ZINC PEROXIDE EQUIVALENT PER 100 WEIGHT PARTS OF SAID BLENDED POLYMERIC STYRENE AND POLYMERIC BUTADIENE BY MECHANICALLY MIXING SAID INGREDIENTS INTO A UNIFORM MASS AT A TEMPERATURE FROM ABOUT 280*F. TO ABOUT 450*F. FOR A TIME SUFFICIENT TO ATTAIN HOMOGENEITY AS DETERMINED BY DISAPPEARANCE OF PEARLY LUSTER OF SAID COMPOSITIONS.
Claim 2
Dependent Claim
119 words
METHOD OF MAKING THERMOPLASTIC COMPOSITIONS CONTAINING A RESINOUS POLYMERIC STYRENE AND A RUBBERY POLYMERIC BUTADIENE WHICH COMPRISES BLENDING 75 TO 97 WEIGHT PARTS OF A RESINOUS POLYMERIC STYRENE WITH 25 TO 3 WEIGHT PARTS OF A RUBBERY POLYMERIC BUTADIENE IN THE PRESENCE OF A METAL PEROXIDE OF THE GROUP CONSISTING OF MGO2, CAO2, ZNO2, SRO2, BAO2, PBO2 AND MIXTURES THEREOF IN AMOUNTS FROM ABOUT 0.03 TO 0.15 WEIGHT PARTS ZINC PEROXIDE EQUIVALENT PER 100 WEIGHT PARTS OF SAID BLENDED POLYMERIC STYRENE AND POLYMERIC BUTADIENE BY MECHANICALLY MIXING SAID INGREDIENTS INTO A UNIFORM MASS AT A TEMPERATURE FROM ABOUT 280*F. TO ABOUT 450*F. FOR A TIME SUFFICIENT TO ATTAIN HOMOGENEITY AS DETERMINED BY DISAPPEARANCE OF PEARLY LUSTER OF SAID COMPOSITIONS.
References Cited (Backward Citations)
US2638462A
Cited
US2439202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |