US2532665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium silicate-rubber compositions containing carbonate esters and methods of compounding thereof
Assignee: PPG Industries Inc
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Filing: 1948-08-31
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Granted: 1950-12-05
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Expires: 1968-08-31
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Gage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:14
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K5/00; C08K5/04; C08K5/10; C08K5/109
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A VULCANIZABLE RUBBER COMPOSITION COMPRISING A HYDROCARBON INTERPOLYMER OF A MAJOR PROPORTION OF ISOBUTYLENE WITH A MINOR PROPORTION OF A POLYOLEFIN HAVING 4 TO 12, INCLUSIVE, CARBON ATOMS PER MOLECULE, FINLEY DIVIDED CALCIUM SILICATE HAVING AN AVERAGE PARTICLE SIZE LESS THAN ONE MICRON AND HAVING A RATIO OF SIO2 TO CAO NOT LESS THAN 2 TO 1 NOR MORE THAN 4 TO 1, AND A SMALL AMOUNT, SUFFICIENT TO DIMINISH STICKINESS BUT NOT OVER 5 PERCENT BY WEIGHT BASED ON THE WEIGHT OF THE INTERPOLYMER, OF A CARBONTE ESTER OF (A) A POLYHDROXY SATURATED ALIPHATIC COMPOUND IN WHICH THE HYDROXY GROUPS ARE ESTERIFIABLE WITH ACIDS AND (B) AN ACID ESTER OF CARBONIC ACID AND AN ALIPHATIC SATURATED MONOHYDROXY COMPOUND WHICH CONTAINS A SINGLE HYDROXY GROUP WHICH IS ESTERIFIABLE WITH ACIDS; WHEREIN THE HYDROXY GROUPS OF (A) ARE ESTERIFIED WITH (B).
Claim 2
Dependent Claim
140 words
A VULCANIZABLE RUBBER COMPOSITION COMPRISING A HYDROCARBON INTERPOLYMER OF A MAJOR PROPORTION OF ISOBUTYLENE WITH A MINOR PROPORTION OF A POLYOLEFIN HAVING 4 TO 12, INCLUSIVE, CARBON ATOMS PER MOLECULE, FINLEY DIVIDED CALCIUM SILICATE HAVING AN AVERAGE PARTICLE SIZE LESS THAN ONE MICRON AND HAVING A RATIO OF SIO2 TO CAO NOT LESS THAN 2 TO 1 NOR MORE THAN 4 TO 1, AND A SMALL AMOUNT, SUFFICIENT TO DIMINISH STICKINESS BUT NOT OVER 5 PERCENT BY WEIGHT BASED ON THE WEIGHT OF THE INTERPOLYMER, OF A CARBONTE ESTER OF (A) A POLYHDROXY SATURATED ALIPHATIC COMPOUND IN WHICH THE HYDROXY GROUPS ARE ESTERIFIABLE WITH ACIDS AND (B) AN ACID ESTER OF CARBONIC ACID AND AN ALIPHATIC SATURATED MONOHYDROXY COMPOUND WHICH CONTAINS A SINGLE HYDROXY GROUP WHICH IS ESTERIFIABLE WITH ACIDS; WHEREIN THE HYDROXY GROUPS OF (A) ARE ESTERIFIED WITH (B).
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) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |