US2952872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of film
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1955-01-28
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Granted: 1960-09-20
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Expires: 1975-01-28
Abstract
No abstract record available.
Inventors
- 👤 Buteux Richard Harold Barclay
- 👤 Cann Johnson Ralph
- 👤 Cornforth Jack Witherington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:13
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/03; B29C48/09; B29C48/10; B29K; B29K2995/00; B29K2995/0037; B29K2995/0072; B29K2995/0073
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
DIE EXTRUSION APPARATUS FOR THE EXTRUSION OF MOLTEN THERMOPLASTIC MATERIAL IN TUBULAR FORM COMPRISING AN ANNULAR OUTER HOUSING MEMBER TERMINATING IN AN ANNULAR PLANAR FLAT-GROUND EXTRUSION SURFACE, THE PLANE OF SAID SURFACE BEING PERPENDICULAR TO THE AXIS OF SAID HOUSING MEMBER, AND INNER CORE MEMBER ARRANGED AXIALLY WITHIN SAID HOUSING MEMBER, SAID CORE MEMBER AND SAID HOUSING MEMBER DEFINING A CHANNEL THEREBETWEEN, AN ANNULAR PLATE MEMBER ALSO HAVING AN ANNULAR PLANAR, FLAT-GROUND EXTRUSION SURFACE, SAILD HOUSING MEMBER AND SAID PLATE MEMBER HAVING NO FIXED PROJECTIONS EXTENDING BEYOND SAID FLAT-GROUND EXTRUSION SURFACES, SAID PLATE MEMBER AND SAID HOUSING MEMBER BEING ARRANGED WITH SAID FLAT-GROUND EXTRUSION SURFACES OPPOSED AND PARALLEL TO EACH OTHER, SAID OPPOSED EXTRUSION SURFACES DEFINING A RADIAL EXTRUSION CHANNEL DIRECTLY COMMUNICATING WITH SAID FIRST-MENTIONED CHANNEL AND TERMINATING IN AN ANNULAR ORIFICE.
Claim 2
Dependent Claim
132 words
DIE EXTRUSION APPARATUS FOR THE EXTRUSION OF MOLTEN THERMOPLASTIC MATERIAL IN TUBULAR FORM COMPRISING AN ANNULAR OUTER HOUSING MEMBER TERMINATING IN AN ANNULAR PLANAR FLAT-GROUND EXTRUSION SURFACE, THE PLANE OF SAID SURFACE BEING PERPENDICULAR TO THE AXIS OF SAID HOUSING MEMBER, AND INNER CORE MEMBER ARRANGED AXIALLY WITHIN SAID HOUSING MEMBER, SAID CORE MEMBER AND SAID HOUSING MEMBER DEFINING A CHANNEL THEREBETWEEN, AN ANNULAR PLATE MEMBER ALSO HAVING AN ANNULAR PLANAR, FLAT-GROUND EXTRUSION SURFACE, SAILD HOUSING MEMBER AND SAID PLATE MEMBER HAVING NO FIXED PROJECTIONS EXTENDING BEYOND SAID FLAT-GROUND EXTRUSION SURFACES, SAID PLATE MEMBER AND SAID HOUSING MEMBER BEING ARRANGED WITH SAID FLAT-GROUND EXTRUSION SURFACES OPPOSED AND PARALLEL TO EACH OTHER, SAID OPPOSED EXTRUSION SURFACES DEFINING A RADIAL EXTRUSION CHANNEL DIRECTLY COMMUNICATING WITH SAID FIRST-MENTIONED CHANNEL AND TERMINATING IN AN ANNULAR ORIFICE.
References Cited (Backward Citations)
US2479804A
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US2529897A
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US2688154A
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US2688766A
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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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |