US2992456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of compounding finely-divided thermoplastic material with a plasticizer
Assignee: Acordis UK Ltd
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Filing: 1954-06-24
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Granted: 1961-07-18
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Expires: 1974-06-24
Abstract
No abstract record available.
Inventors
- 👤 Pearson Eric
- 👤 King John Philip Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:58
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/002; B29B7/007; B29B7/30; B29B7/34; B29B7/52; B29B7/56; B29B7/58; B29B7/60; B29B7/606; B29B7/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
PROCESS FOR COMPOUNDING FINELY-DIVIDED THERMOPLASTIC MATERIAL WITH A PLASTICIZER IN LIQUID CONDITION, WHICH COMPRISES CONTINOUSLY FEEDING THE FINELY-DIVIDED THERMOPLASTIC MATERIAL DOWNWARDS AT A SUBSTANTIALLY CONSTANT RATE INTO THE PASS BETWEEN TWO INDENTICAL CYLINDRICAL SURFACES ROTATING SIDE BY SIDE AT THE SAME SPEED IN OPPOSITE DIRECTIONS ABOUT PARALLEL AXES, THE FEED BEING EFFECTED IN SUCH A RATE AS TO MAINTAIN A BANK OF SAID MATERIAL WITHIN SAID PASS, CONTINUOUSLY SUPPLYING THE LIQUID PLASTICIZER AT A SUBSTANTIALLY CONSTANT RATE TO EACH OF SAID SURFACES IN A REGION REMOTE FROM SAID PASS IN SUCH A WAY AS TO MAINTAIN ON SAID SURFACE A LAYER OF THE PLASTICIZER EXTENDING FROM SAID REGION INTO CONTACT WITH SAID BANK OF MATERIAL, ALLOWING THE MATERIAL EMERGING FROM SAID PAS TO FALL AWAY FROM SAID SURFACES AND PREVENTING ANY OF SAID MATERIAL FROM BEING CARRIED BY SAID SURFACES INTO THE REGION IN WHICH THE PLASTICIZER IS APPLIED.
Claim 2
Dependent Claim
149 words
PROCESS FOR COMPOUNDING FINELY-DIVIDED THERMOPLASTIC MATERIAL WITH A PLASTICIZER IN LIQUID CONDITION, WHICH COMPRISES CONTINOUSLY FEEDING THE FINELY-DIVIDED THERMOPLASTIC MATERIAL DOWNWARDS AT A SUBSTANTIALLY CONSTANT RATE INTO THE PASS BETWEEN TWO INDENTICAL CYLINDRICAL SURFACES ROTATING SIDE BY SIDE AT THE SAME SPEED IN OPPOSITE DIRECTIONS ABOUT PARALLEL AXES, THE FEED BEING EFFECTED IN SUCH A RATE AS TO MAINTAIN A BANK OF SAID MATERIAL WITHIN SAID PASS, CONTINUOUSLY SUPPLYING THE LIQUID PLASTICIZER AT A SUBSTANTIALLY CONSTANT RATE TO EACH OF SAID SURFACES IN A REGION REMOTE FROM SAID PASS IN SUCH A WAY AS TO MAINTAIN ON SAID SURFACE A LAYER OF THE PLASTICIZER EXTENDING FROM SAID REGION INTO CONTACT WITH SAID BANK OF MATERIAL, ALLOWING THE MATERIAL EMERGING FROM SAID PAS TO FALL AWAY FROM SAID SURFACES AND PREVENTING ANY OF SAID MATERIAL FROM BEING CARRIED BY SAID SURFACES INTO THE REGION IN WHICH THE PLASTICIZER IS APPLIED.
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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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |