US3141004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent vulcanizate
Assignee: PPG Industries Inc
•
Filing: 1960-02-05
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Granted: 1964-07-14
•
Expires: 1980-02-05
Abstract
No abstract record available.
Inventors
- 👤 Ralph F Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/19; C08K3/00; C08K3/28; C08K3/34; C08K3/36; C08K5/04; C08K5/09; C08K5/098; C08K5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
THE PROCESS OF PRODUCING A TRANSPARENT VULCANIZATE WHICH COMPRISES MIXING A VULCANIZABLE RUBBER WITH A REINFORCING FINELY-DIVIDED HYDRATED SILICA HAVING AN AVERAGE ULTIMATE PARTICLE SIZE OF 0.01 TO 0.05 MICRON AND AN INDEX OF REFRACTION OF 1.450 TO 1.465, A VULCANIZING AGENT AND AN ONIUM COMPOUND FROM THE GROUP CONSISTING OF AMMONIUM SALTS AND QUATERNARY AMMONIUM SALTS, AND VULCANIZING SAID MIXTURE WHEREBY TO FORM A VULCANIZATE HAVING AN OPACITY BELOW 50 PERCENT, WHICH OPACITY IS MEASURED AS 100 TIMES THE RATIO OF GREEN LIGHT REFLECTANCE FROM A 0.075 INCH SHEET OF SAID VULCANIZATE OVER A BLACK BACKGROUND TO THE REFLECTANCE OBTAINED FRO M SUCH SHEET OVER A WHITE BACKGROUND.
Claim 2
Dependent Claim
109 words
THE PROCESS OF PRODUCING A TRANSPARENT VULCANIZATE WHICH COMPRISES MIXING A VULCANIZABLE RUBBER WITH A REINFORCING FINELY-DIVIDED HYDRATED SILICA HAVING AN AVERAGE ULTIMATE PARTICLE SIZE OF 0.01 TO 0.05 MICRON AND AN INDEX OF REFRACTION OF 1.450 TO 1.465, A VULCANIZING AGENT AND AN ONIUM COMPOUND FROM THE GROUP CONSISTING OF AMMONIUM SALTS AND QUATERNARY AMMONIUM SALTS, AND VULCANIZING SAID MIXTURE WHEREBY TO FORM A VULCANIZATE HAVING AN OPACITY BELOW 50 PERCENT, WHICH OPACITY IS MEASURED AS 100 TIMES THE RATIO OF GREEN LIGHT REFLECTANCE FROM A 0.075 INCH SHEET OF SAID VULCANIZATE OVER A BLACK BACKGROUND TO THE REFLECTANCE OBTAINED FRO M SUCH SHEET OVER A WHITE BACKGROUND.
References Cited (Backward Citations)
US2692869A
Cited
US2692871A
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US2692870A
Cited
US2697699A
Cited
US2919260A
Cited
US3014883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |