US3159696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for casting of shaped articles
Assignee: Avisun Corp
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Filing: 1961-11-07
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Granted: 1964-12-01
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Expires: 1981-11-07
Abstract
No abstract record available.
Inventors
- 👤 Jr William J Hodgson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:14
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29C48/915; B29C48/917; B29C48/03; B29C48/07; B29C48/08; B29C48/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A METHOD OF FORMING TRANSPARENT FILMS INCLUDING THE STEPS OF PROVIDING A SHAPED STREAM OF MOLTEN THERMOPLASTIC POLYMER CONTAINING AT LEAST ONE ADDITIVE MATERIAL, CONTACTING ONE SURFACE OF THE SHAPED STREAM OF MOLTEN POLYMER WITH A MOVING CHILL SURFACE TO RAPIDLY COOL THE STREAM AND PROVIDE A SOLID FILM DIRECTING A STREAM OF GAS AGAINST THE EXPOSED SURFACE OF THE SHAPED STREAM OF MOLTEN POLYMER SUBSTANTIALLY ALONG ITS ENTIRE WIDTH, FORCIBLY ENGAGING A NON-CONTINUOUS RESILIENT SURFACE AGAINST AND TRANSVERSELY ACROSS THE EXPOSED SURFACE OF SOLID FILM TO THEREBY URGE THE FILM AGAINST THE CHILL SURFACE UNDER PRESSURE, RELEASING THE PRESSURE FROM THE FILM AND REMOVING THE FILM FROM THE CHILL SURFACE.
Claim 2
Independent Claim
111 words
A METHOD OF FORMING TRANSPARENT FILMS INCLUDING THE STEPS OF PROVIDING A SHAPED STREAM OF MOLTEN THERMOPLASTIC POLYMER CONTAINING AT LEAST ONE ADDITIVE MATERIAL, CONTACTING ONE SURFACE OF THE SHAPED STREAM OF MOLTEN POLYMER WITH A MOVING CHILL SURFACE TO RAPIDLY COOL THE STREAM AND PROVIDE A SOLID FILM DIRECTING A STREAM OF GAS AGAINST THE EXPOSED SURFACE OF THE SHAPED STREAM OF MOLTEN POLYMER SUBSTANTIALLY ALONG ITS ENTIRE WIDTH, FORCIBLY ENGAGING A NON-CONTINUOUS RESILIENT SURFACE AGAINST AND TRANSVERSELY ACROSS THE EXPOSED SURFACE OF SOLID FILM TO THEREBY URGE THE FILM AGAINST THE CHILL SURFACE UNDER PRESSURE, RELEASING THE PRESSURE FROM THE FILM AND REMOVING THE FILM FROM THE CHILL SURFACE.
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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |