Patent US3177168A successfully refreshed from Google Patents.
US3177168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High impact polystyrene
Assignee: Shell USA Inc
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Filing: 1960-01-25
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Granted: 1965-04-06
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Expires: 1980-01-25
Abstract
No abstract record available.
Inventors
- 👤 Hans E Lunk
- 👤 Marshall E Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:36
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L21/00; C08L91/00; C08L91/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A HIGH IMPACT POLYSTYRENE MOLDING COMPOSITION COMPRISING FROM ABOUT 85 TO ABOUT 98 PARTS BY WEIGHT OF POLYMERIZED STYRENE, FROM ABOUT 2 TO ABOUT 15 PARTS BY WEIGHT OF A RUBBER POLYMER, AND FROM ABOUT 1 TO ABOUT 6 PARTS BY WEIGHT OF A LUBRICANT, SAID LUBRICANT COMPRISING FROM 0.5 TO ABOUT 2.5 PARTS BY WEIGHT OF A HYDROCARBON OIL AND FROM ABOUT 1.5 TO ABOUT 3.5 PARTS BY WEIGHT OF A PARAFFIN WAX WHICH CONSISTS SUBSTANTIALLY ONL, OF ALKANES AND NAPHTHENES, AND WHICH HAS A MELTING POINT BETWEEN 40* AND 70*C.
Claim 2
Dependent Claim
92 words
A HIGH IMPACT POLYSTYRENE MOLDING COMPOSITION COMPRISING FROM ABOUT 85 TO ABOUT 98 PARTS BY WEIGHT OF POLYMERIZED STYRENE, FROM ABOUT 2 TO ABOUT 15 PARTS BY WEIGHT OF A RUBBER POLYMER, AND FROM ABOUT 1 TO ABOUT 6 PARTS BY WEIGHT OF A LUBRICANT, SAID LUBRICANT COMPRISING FROM 0.5 TO ABOUT 2.5 PARTS BY WEIGHT OF A HYDROCARBON OIL AND FROM ABOUT 1.5 TO ABOUT 3.5 PARTS BY WEIGHT OF A PARAFFIN WAX WHICH CONSISTS SUBSTANTIALLY ONL, OF ALKANES AND NAPHTHENES, AND WHICH HAS A MELTING POINT BETWEEN 40* AND 70*C.
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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |