US3285865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable polymers
Assignee: Atlantic Richfield Co
•
Filing: 1963-07-11
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Granted: 1966-11-15
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Expires: 1983-07-11
Abstract
No abstract record available.
Inventors
- 👤 Bene Sam J Del
- 👤 Alan J Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; C08J2423/00; C08L2205/00; C08L2205/14; C08L2205/18; C08L23/00; C08L23/02; C08L23/04; C08L23/06; Y; Y10; Y10S; Y10S521/00; Y10S521/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
AN EXPANDABLE THERMOPLASTIC COMPOSITION CAPABLE OF BEING MOLDED INTO FOAM STRUCTURES HAVING SMOOTH UNIFORM SURFACES, A WATER VAPOR TRANSMISSION NOT GREATER THAN 1.4 PERMS, AND A SOLVENT RESISTANCE TIME OF AT LEAST 2 MINUTES FOR A FOAM THICKNESS OF 115 MILS, COMPRISING POLYSTYRENE PARTICLES IN COMBINATION WITH A MINOR AMOUNT OF FROM 3 TO 10 PERCENT BY WEIGHT OF SAID COMPOSITION OF POWDERED POLYETHYLENE, SAID POLYSTYRENE PARTICLES HAVING HOMOGENEOUSLY INCORPORATED THEREIN A NORMALLY LIQUID ALIPHATIC HYDROCARBON BLOWING AGENT, BOILING IN THE RANGE OF FROM ABOUT 20-100*C.
Claim 2
Dependent Claim
86 words
AN EXPANDABLE THERMOPLASTIC COMPOSITION CAPABLE OF BEING MOLDED INTO FOAM STRUCTURES HAVING SMOOTH UNIFORM SURFACES, A WATER VAPOR TRANSMISSION NOT GREATER THAN 1.4 PERMS, AND A SOLVENT RESISTANCE TIME OF AT LEAST 2 MINUTES FOR A FOAM THICKNESS OF 115 MILS, COMPRISING POLYSTYRENE PARTICLES IN COMBINATION WITH A MINOR AMOUNT OF FROM 3 TO 10 PERCENT BY WEIGHT OF SAID COMPOSITION OF POWDERED POLYETHYLENE, SAID POLYSTYRENE PARTICLES HAVING HOMOGENEOUSLY INCORPORATED THEREIN A NORMALLY LIQUID ALIPHATIC HYDROCARBON BLOWING AGENT, BOILING IN THE RANGE OF FROM ABOUT 20-100*C.
References Cited (Backward Citations)
US2744291A
Cited
US2787809A
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US2945828A
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US3065190A
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US3224984A
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US3137745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |