Patent US3280238A successfully refreshed from Google Patents.
US3280238A
Expired / Lapsed
US
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Method of forming and attaching plastic structures
Assignee: Union Carbide Corp
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Filing: 1964-08-25
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Granted: 1966-10-18
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Expires: 1984-08-25
Abstract
No abstract record available.
Inventors
- 👤 William L Calvert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:07
CPC Classifications
B; B29; B29C; B29C43/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
METHOD OF FORMING A PLASTIC STRUCTURE INTEGRAL WITH THERMOPLASTIC FILM WHICH COMPRISES: (A) SUPPORTING A SHEET OF FILM OVER A MOLD CAVITY; (B) INTRODUCING A HEATED PLASTIC MASS PROXIMATE AN ANNULARLY, RIGIDLY SUPPORTED PORTION OF SAID FILM; (C) ALLOWING SAID HEATED PLASTIC MASS TO PIERCE SAID FILM IN THE ZONE FORMED BY SAID ANNULAR SUPPORT AND ENTER THE MOLD CAVITY UPON PIERCING THE FILM; AND (D) DISPLACING SAID HEATED PLASTIC MASS PROXIMATE THE PIERCED PORTION OF SAID FILM AND UP ALONG THE SIDE WALLS OF THE CAVITY THEREBY SIMULTANEOUSLY FORMING AND FUSING A PLASTIC STRUCTURE TO SAID FILM.
Claim 2
Dependent Claim
98 words
METHOD OF FORMING A PLASTIC STRUCTURE INTEGRAL WITH THERMOPLASTIC FILM WHICH COMPRISES: (A) SUPPORTING A SHEET OF FILM OVER A MOLD CAVITY; (B) INTRODUCING A HEATED PLASTIC MASS PROXIMATE AN ANNULARLY, RIGIDLY SUPPORTED PORTION OF SAID FILM; (C) ALLOWING SAID HEATED PLASTIC MASS TO PIERCE SAID FILM IN THE ZONE FORMED BY SAID ANNULAR SUPPORT AND ENTER THE MOLD CAVITY UPON PIERCING THE FILM; AND (D) DISPLACING SAID HEATED PLASTIC MASS PROXIMATE THE PIERCED PORTION OF SAID FILM AND UP ALONG THE SIDE WALLS OF THE CAVITY THEREBY SIMULTANEOUSLY FORMING AND FUSING A PLASTIC STRUCTURE TO SAID FILM.
References Cited (Backward Citations)
USRE25313E
Cited
US1754496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |