US3172154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion apparatus
Assignee: Dow Chemical Co
•
Filing: 1961-09-27
•
Granted: 1965-03-09
•
Expires: 1981-09-27
Abstract
No abstract record available.
Inventors
- 👤 Allan D Martin
- 👤 Irving S Houvener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:42
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/301; B29C48/03; B29C48/07; B29C48/08; B29C48/12; B29C48/05; B29C48/13; B29C48/15; B29K; B29K2995/00; B29K2995/0037; B29K2995/0072; B29L; B29L2007/00; B29L2007/001; B29L2028/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
APPARATUS FOR FABRICATING A FLAT FILM HAVING A RIBBED EXTERIOR SURFACE COMPRISING MEANS TO EXTRUDE MATERIAL IN FLUID FROM, A BODY WITH A CAVITY THEREIN AND FORMED WITH A FILM FORMING ORIFICE AND A SLOT IN ONE OF ITS WALLS, SAID ORIFICE OPENING INTO SAID SLOT, SAID CAVITY COMMUNICATING WITH SAID EXTRUSION MEANS, NOZZLE MEANS SLIDABLY ARRANGED WITHIN SAID CAVITY, SAID NOZZLE MEANS BEING FORMED TO PROVIDE AN IRREGULAR SHAPED GROOVE AND MEANS FOR CAUSING RECIPROCAL MOVEMENT THE NOZZLE MEANS TO CAUSE MOVEMENT OF SAID GROOVE PAST SAID SLOT WHEREBY RIBBONS OF PLASTIC MATERIAL WILL BE EXTRUDED THROUGH EVERY INTERSECTION BETWEEN THE GROOVE AND THE SLOT AND WHILE MATERIAL IS EXTRUDED THROUGH SAID FILM FORMING ORIFICE TO FORM A FLAT FILM WITH A RIBBED EXTERIOR SURFACE.
Claim 2
Dependent Claim
126 words
APPARATUS FOR FABRICATING A FLAT FILM HAVING A RIBBED EXTERIOR SURFACE COMPRISING MEANS TO EXTRUDE MATERIAL IN FLUID FROM, A BODY WITH A CAVITY THEREIN AND FORMED WITH A FILM FORMING ORIFICE AND A SLOT IN ONE OF ITS WALLS, SAID ORIFICE OPENING INTO SAID SLOT, SAID CAVITY COMMUNICATING WITH SAID EXTRUSION MEANS, NOZZLE MEANS SLIDABLY ARRANGED WITHIN SAID CAVITY, SAID NOZZLE MEANS BEING FORMED TO PROVIDE AN IRREGULAR SHAPED GROOVE AND MEANS FOR CAUSING RECIPROCAL MOVEMENT THE NOZZLE MEANS TO CAUSE MOVEMENT OF SAID GROOVE PAST SAID SLOT WHEREBY RIBBONS OF PLASTIC MATERIAL WILL BE EXTRUDED THROUGH EVERY INTERSECTION BETWEEN THE GROOVE AND THE SLOT AND WHILE MATERIAL IS EXTRUDED THROUGH SAID FILM FORMING ORIFICE TO FORM A FLAT FILM WITH A RIBBED EXTERIOR SURFACE.
References Cited (Backward Citations)
US819150A
Cited
US2919467A
Cited
US2910724A
Cited
DE1085330B
Cited
US3019483A
Cited
DE1109131B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |