US3293197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomer blending process
Assignee: Shell USA Inc
•
Filing: 1963-08-15
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Granted: 1966-12-20
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Expires: 1983-08-15
Abstract
No abstract record available.
Inventors
- 👤 Harry L Vincent
- 👤 Legge Norman Reginald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:24
CPC Classifications
C; C08; C08L; C08L9/00; C08J; C08J3/00; C08J3/005; C08L9/06; C08J2321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A RUBBER BLENDING PROCESS COMPRISING: (A) EMULSIFYING A RUBBER CEMENT WITH A RUBBER LATEX; (B) ADJUSTING THE PH OF THE EMULSION TO BETWEEN ABOUT 3 AND ABOUT 4.5; (C) SUBJECTING THE EMULSION TO A HIGH RATE OF SHEAR; AND, (D) STEAM-COAGULATING THE RUBBERS, WHEREBY CEMENT SOLVENT IS FLASHED OFF AND COAGULATED REBBER CRUMB IS RECOVERED.
Claim 2
Dependent Claim
55 words
A RUBBER BLENDING PROCESS COMPRISING: (A) EMULSIFYING A RUBBER CEMENT WITH A RUBBER LATEX; (B) ADJUSTING THE PH OF THE EMULSION TO BETWEEN ABOUT 3 AND ABOUT 4.5; (C) SUBJECTING THE EMULSION TO A HIGH RATE OF SHEAR; AND, (D) STEAM-COAGULATING THE RUBBERS, WHEREBY CEMENT SOLVENT IS FLASHED OFF AND COAGULATED REBBER CRUMB IS RECOVERED.
References Cited (Backward Citations)
US3041299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |