US3179637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene-encapsulated product and method of making same
Assignee: EIDP Inc
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Filing: 1961-07-18
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Granted: 1965-04-20
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Expires: 1981-07-18
Abstract
No abstract record available.
Inventors
- 👤 Burton P Brodt
- 👤 Stanley G Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:01
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/10; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2989
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
128 words
A PROCESS FOR THE PREPARATION OF DELAYED-ACTION ELASTOMER PROCESSING AGENTS COMPRISING THE STEPS OF DISPERSING 20 TO 70 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE COMPOSITION OF A POWDERED MATERIAL SELECTED FROM THE GROUP CONSISTING OF 2-MERCPTO-2-IMIDAZOLINE, 1,3-DIETHYL-2-THIOUREA, SULFUR, PYROGALLOL, AND CATECHOL IN A MOLTEN POLYETHYLENE HAVING A MELTING POINT OF FROM ABOUT 99* C. TO ABOUT 135* C. AND A VISCOSITY AT 140*C. OF NO GREATER THAN 300 CENTIPOISES; FREEZING THE RESULTING COMPOSIITION, COMMINUTING SAID SOLIDFIED COMPOSITION TO AN AVERAGE PARTICLE SIZE OF AT LEAST 7 TIMES LARGER THAN THE AVERAGE PARTICLE DIAMETER OF SAID POWDERED MATERIAL; WASHING SAID COMMINUTED COMPOSITION WITH A SOLVENT IN WHICH SAID POWDERED MATERIAL IS SOLUBLE AND SAID POLYETHYLENE IS INSSOLUBLE; AND REMOVING SAID SOLVENT FROM SAID COMMINUTED COMPOSITION.
Claim 2
Dependent Claim
128 words
A PROCESS FOR THE PREPARATION OF DELAYED-ACTION ELASTOMER PROCESSING AGENTS COMPRISING THE STEPS OF DISPERSING 20 TO 70 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE COMPOSITION OF A POWDERED MATERIAL SELECTED FROM THE GROUP CONSISTING OF 2-MERCPTO-2-IMIDAZOLINE, 1,3-DIETHYL-2-THIOUREA, SULFUR, PYROGALLOL, AND CATECHOL IN A MOLTEN POLYETHYLENE HAVING A MELTING POINT OF FROM ABOUT 99* C. TO ABOUT 135* C. AND A VISCOSITY AT 140*C. OF NO GREATER THAN 300 CENTIPOISES; FREEZING THE RESULTING COMPOSIITION, COMMINUTING SAID SOLIDFIED COMPOSITION TO AN AVERAGE PARTICLE SIZE OF AT LEAST 7 TIMES LARGER THAN THE AVERAGE PARTICLE DIAMETER OF SAID POWDERED MATERIAL; WASHING SAID COMMINUTED COMPOSITION WITH A SOLVENT IN WHICH SAID POWDERED MATERIAL IS SOLUBLE AND SAID POLYETHYLENE IS INSSOLUBLE; AND REMOVING SAID SOLVENT FROM SAID COMMINUTED COMPOSITION.
Claim 3
Dependent Claim
81 words
A DELAYED-ACTIONN, ELASTOMER PROCESSING AGENT COMPOSITION COMPRISING PARTICLES OF A POLYETHYLENE MATRIX CONTAINING THEREIN AN ELASTOMER PROCESSING AGENT SELECTED FROM THE GROUP CONSISTING OF 2-MERCAPTO-2-IMIDAZOLINE, 1,3-DIETHYL-2-THIOUREA, SULFUR, CATECHOL, AND PYROGALLOL, ENCAPSULATED IN POLYETHYLENE HAVING A MELTING POINT OF FROM ABOUT 99*C. TO ABOUT 135* C. AND A VISCOSITY AT 140*C. OF NO GREATER THAN 300 CENTIPOISES, SAID ENCAPSULATED PARTICLES HAVING AN AVERAGE PARTICLE SIE OF AT LEAT 7 TIMES LARGER THAN THE AVERAGE PARTICLE DIAMETER OF THE PRROCESSING AGENT BEFORE ENCAPSULATION.
Claim 4
Dependent Claim
81 words
A DELAYED-ACTIONN, ELASTOMER PROCESSING AGENT COMPOSITION COMPRISING PARTICLES OF A POLYETHYLENE MATRIX CONTAINING THEREIN AN ELASTOMER PROCESSING AGENT SELECTED FROM THE GROUP CONSISTING OF 2-MERCAPTO-2-IMIDAZOLINE, 1,3-DIETHYL-2-THIOUREA, SULFUR, CATECHOL, AND PYROGALLOL, ENCAPSULATED IN POLYETHYLENE HAVING A MELTING POINT OF FROM ABOUT 99*C. TO ABOUT 135* C. AND A VISCOSITY AT 140*C. OF NO GREATER THAN 300 CENTIPOISES, SAID ENCAPSULATED PARTICLES HAVING AN AVERAGE PARTICLE SIE OF AT LEAT 7 TIMES LARGER THAN THE AVERAGE PARTICLE DIAMETER OF THE PRROCESSING AGENT BEFORE ENCAPSULATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |