US3068197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubbery polymer and process
Assignee: Shell USA Inc
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Filing: 1960-11-29
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Granted: 1962-12-11
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Expires: 1980-11-29
Abstract
No abstract record available.
Inventors
- 👤 Albert L Rocklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:07
CPC Classifications
C; C08; C08C; C08C2/00; C08C2/06; C08K; C08K5/00; C08K5/04; C08K5/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
THE PROCESS FOR RECOVERING COLORLESS SOLID RUBBERY HYDROCARBON POLYMER FROM HYDROCARBON SOLUTION COMPRISING BLENDING WITH THE HYDROCARBON SOLUTION OF POLYMER FROM 0.01 TO 5 PARTS OF A 3,5-DIALKYL-4-HYDROXYBENZYL ALCOHOL PER HUNDRED PARTS OF POLYMER AND AN ACID IN AN AMOUNT LESS THAN THE EQUIVALENT OF SAID ALCOHOL DISPERSING SAID SOLUTION IN AN AQUEOUS MEDIUM SUBSTANTIALLY FREE OF METAL IONS AT A TEMPERATURE ABOVE THE BOILING POINT OF THE MIXTURE OF THE HYDROCARBON SOLVENT AND WATER AT THE PROCESS PRESSURE, AND RECOVERING CRUMBS OF POLYMER CAPABLE OF BEING MILLED TO FORM A SUBSTANTIALLY COLORLESS, CLEAR RUBBER.
Claim 2
Dependent Claim
95 words
THE PROCESS FOR RECOVERING COLORLESS SOLID RUBBERY HYDROCARBON POLYMER FROM HYDROCARBON SOLUTION COMPRISING BLENDING WITH THE HYDROCARBON SOLUTION OF POLYMER FROM 0.01 TO 5 PARTS OF A 3,5-DIALKYL-4-HYDROXYBENZYL ALCOHOL PER HUNDRED PARTS OF POLYMER AND AN ACID IN AN AMOUNT LESS THAN THE EQUIVALENT OF SAID ALCOHOL DISPERSING SAID SOLUTION IN AN AQUEOUS MEDIUM SUBSTANTIALLY FREE OF METAL IONS AT A TEMPERATURE ABOVE THE BOILING POINT OF THE MIXTURE OF THE HYDROCARBON SOLVENT AND WATER AT THE PROCESS PRESSURE, AND RECOVERING CRUMBS OF POLYMER CAPABLE OF BEING MILLED TO FORM A SUBSTANTIALLY COLORLESS, CLEAR RUBBER.
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) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |