Patent US5026656A successfully refreshed from Google Patents.
Patent US3045287A successfully refreshed from Google Patents.
US3045287A
Expired / Lapsed
US
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Method for molding thin sections of tetrafluoroethylene
Assignee: Allegheny Plastics Inc
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Filing: 1960-02-23
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Granted: 1962-07-24
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Expires: 1980-02-23
Abstract
No abstract record available.
Inventors
- 👤 James M Yost
- 👤 William E Moritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:25
CPC Classifications
B; B29; B29C; B29C67/00; B29C53/00; B29C53/02; B29D; B29D99/00; B29D99/0053; B29C2793/00; B29L; B29L2031/00; B29L2031/26; Y; Y10; Y10S; Y10S264/00; Y10S264/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
METHOD FOR THE PRODUCTION OF THIN ARTICLES FROM COLD TETRAFLUOROETHYLENE BY A REMOLDING OPERATON BETWEEN A COAXIAL PAIR OF RELATIVELY COLD MALE AND FEMALE DIES PRESENTING COMPLEMENTARY SURFACES TO ONE ANOTHER, SAID METHOD COMPRISING CENTERING A COLD BLANK OF THE TETRAFLUOROETHYLENE, FORCIBLY BRINGING THE DIES TOGETHER THUS CLAMPING A PORTION OF THE BLANK THEREBETWEEN UNDER AXIAL PRESSURE, SIMULTANEOUSLY THEREWITH WHILE RELATIVELY ROTATING SAID DIES DEVELOPING HEAT OF FRICTION IN SAID BLANK INCIDENTAL TO SUBJECTING SAID PORTION THEREOF TO A REMOLDING PRESSURE BY MEANS OF SAID AXIAL FORCE ON THE DIES, MAINTAINING SAID PRESSURE AND ROTATION UNTIL A MANIFEST YIELDING POINT OF SAID BLANK PORTION IS REACHED AND THE MOLDING PRESSURE DISHES THE ARTICLE INTO COMPLETE CONFORMITY INSIDE THE CAVITY IN SAID FEMALE DIE AND THEN REMOVING SAID PRESSURE, AND THEREAFTER WHILE THE DISHED PORTION IS COOLING, REMOVING THE ARTICLE FROM SAID DIES.
Claim 2
Dependent Claim
142 words
METHOD FOR THE PRODUCTION OF THIN ARTICLES FROM COLD TETRAFLUOROETHYLENE BY A REMOLDING OPERATON BETWEEN A COAXIAL PAIR OF RELATIVELY COLD MALE AND FEMALE DIES PRESENTING COMPLEMENTARY SURFACES TO ONE ANOTHER, SAID METHOD COMPRISING CENTERING A COLD BLANK OF THE TETRAFLUOROETHYLENE, FORCIBLY BRINGING THE DIES TOGETHER THUS CLAMPING A PORTION OF THE BLANK THEREBETWEEN UNDER AXIAL PRESSURE, SIMULTANEOUSLY THEREWITH WHILE RELATIVELY ROTATING SAID DIES DEVELOPING HEAT OF FRICTION IN SAID BLANK INCIDENTAL TO SUBJECTING SAID PORTION THEREOF TO A REMOLDING PRESSURE BY MEANS OF SAID AXIAL FORCE ON THE DIES, MAINTAINING SAID PRESSURE AND ROTATION UNTIL A MANIFEST YIELDING POINT OF SAID BLANK PORTION IS REACHED AND THE MOLDING PRESSURE DISHES THE ARTICLE INTO COMPLETE CONFORMITY INSIDE THE CAVITY IN SAID FEMALE DIE AND THEN REMOVING SAID PRESSURE, AND THEREAFTER WHILE THE DISHED PORTION IS COOLING, REMOVING THE ARTICLE FROM SAID DIES.
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) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |