Patent US2576444A successfully refreshed from Google Patents.
US2576444A
Expired / Lapsed
US
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Art of treating plastic materials such as rubber
Assignee: Individual
•
Filing: 1949-03-29
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Granted: 1951-11-27
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Expires: 1969-03-29
Abstract
No abstract record available.
Inventors
- 👤 James C Clinefelter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:27
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/285; B29C48/29; B29C48/03; B29C48/09; B29K; B29K2105/00; B29K2105/0005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A RUBBER TREATING PROCESS, COMPRISING THE STEPS OF CONTINUOUSLY KNEADING AND BREAKING DOWN RUBBER STOCK TO PHYSICALLY PLASTICIZE IT, SIMULTANEOUSLY ADVANCING SAID RUBBER STOCK TOWARDS AND THROUGH AN EXTRUSION DIE TO FORM A CONTINUOUS TUBE OF SAID RUBBER STOCK, CONTINUOUSLY FEEDING A COMPOUNDING AGENT OR AGENTS INTO SAID TUBER AS IT SI EXTRUDED IN SUFFICIENT AMOUNT TO FILL COMPLETELY THE TUBE, AND MIXING THE RESULTING COMPOSITE PRODUCT TO EFECT DISPERSION OF SAID
Claim 2
Dependent Claim
72 words
A RUBBER TREATING PROCESS, COMPRISING THE STEPS OF CONTINUOUSLY KNEADING AND BREAKING DOWN RUBBER STOCK TO PHYSICALLY PLASTICIZE IT, SIMULTANEOUSLY ADVANCING SAID RUBBER STOCK TOWARDS AND THROUGH AN EXTRUSION DIE TO FORM A CONTINUOUS TUBE OF SAID RUBBER STOCK, CONTINUOUSLY FEEDING A COMPOUNDING AGENT OR AGENTS INTO SAID TUBER AS IT SI EXTRUDED IN SUFFICIENT AMOUNT TO FILL COMPLETELY THE TUBE, AND MIXING THE RESULTING COMPOSITE PRODUCT TO EFECT DISPERSION OF SAID
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |