US2862958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving electrical properties of plasticizers by treatment with magnesium silicate
Assignee: Hercules Powder Co
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Filing: 1955-10-13
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Granted: 1958-12-02
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Expires: 1975-10-13
Abstract
No abstract record available.
Inventors
- 👤 Theodore N Goreau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:31
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/48; C07C67/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE PROCESS WHICH COMPRISES CONTACTING A DIALKYL ESTER OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ISOPHTHALIC AND TEREPHTHALIC ACIDS WITH A SYNTHETIC HYDROUS MAGNESIUM SILICATE IN THE AMOUNT OF AT LEAST 0.1% BY WEIGHT OF SAID ESTER AT A TEMPERATURE FROM ABOUT 20 TO 157*C. AND FOR A TIME OF AT LEAST ABOUT ONE MINUTE, WHEREBY THE VOLUME RESISTIVITY OF SAID ESTER IS IMPROVED THEREBY RENDERING IT MORE USEFUL AS A PLASTICIZER FOR SYNTHETIC RESINS.
Claim 2
Dependent Claim
77 words
THE PROCESS WHICH COMPRISES CONTACTING A DIALKYL ESTER OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ISOPHTHALIC AND TEREPHTHALIC ACIDS WITH A SYNTHETIC HYDROUS MAGNESIUM SILICATE IN THE AMOUNT OF AT LEAST 0.1% BY WEIGHT OF SAID ESTER AT A TEMPERATURE FROM ABOUT 20 TO 157*C. AND FOR A TIME OF AT LEAST ABOUT ONE MINUTE, WHEREBY THE VOLUME RESISTIVITY OF SAID ESTER IS IMPROVED THEREBY RENDERING IT MORE USEFUL AS A PLASTICIZER FOR SYNTHETIC RESINS.
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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |