Patent US4189783A successfully refreshed from Google Patents.
Patent US3071498A successfully refreshed from Google Patents.
US3071498A
Expired / Lapsed
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Methods of and compositions for cleaning plastics extruders
Assignee: AT&T Inc
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Filing: 1960-11-09
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Granted: 1963-01-01
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Expires: 1980-11-09
Abstract
No abstract record available.
Inventors
- 👤 Walter E Kaskel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:10
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/27; B29C48/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A COMPOSITION FOR CLEANING INTERIOR PLASTICS-WORKING SURFACES OF PLASTIC EXTRUDERS, WHICH COMPRISES A GRANULATED ORGANOPLASTIC MATERIAL, AND SILICONE OIL IN THE FORM OF A FILM COATING THE GRANULOS OF THE ORGANOPLASTIC MATERIAL, SAID ORGANOPLASTIC MATERIAL BEING PHYSICALLY INCOM-
Claim 2
Dependent Claim
38 words
A COMPOSITION FOR CLEANING INTERIOR PLASTICS-WORKING SURFACES OF PLASTIC EXTRUDERS, WHICH COMPRISES A GRANULATED ORGANOPLASTIC MATERIAL, AND SILICONE OIL IN THE FORM OF A FILM COATING THE GRANULOS OF THE ORGANOPLASTIC MATERIAL, SAID ORGANOPLASTIC MATERIAL BEING PHYSICALLY INCOM-
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |