US3738948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber compositions
Assignee: PPG Industries Inc
•
Filing: 1970-12-21
•
Granted: 1973-06-12
•
Expires: 1990-12-21
Abstract
Abstract FIBER REINFORCED RUBBER COMPOSITIONS AND PARTICULARILY VEHICULAR TIRES EMPLOYING A VULCANIZATION PRODUCT COMPRISING A FINELY-DIVIDED REINFORCING SILICEOUS FILLER, A METHYLENE DONOR COMPOUND SUCH AS HEXAMETHYLENE TETRAMINE, MULTIFUNCTIONAL PHENOL SUCH AS RESORCINOL AND A COMPATIBLE METAL SOAP SUCH AS CALCIUM STEARATE, AND A NOVEL PROCESS OF PREPARATION ARE PROVIDED.
Inventors
- 👤 D Dunnom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:29
CPC Classifications
C; C08; C08L; C08L21/00; Y; Y10; Y10S; Y10S525/00; Y10S525/935
Claims Analysis
Total Claims: 0
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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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |