Patent US3415796A successfully refreshed from Google Patents.
US3415796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruded matte finish acrylic film
Assignee: Rohm and Haas Co
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Filing: 1966-03-24
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Granted: 1968-12-10
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Expires: 1986-03-24
Abstract
No abstract record available.
Inventors
- 👤 Souder Louis Charles
- 👤 Powell John Alexander
- 👤 Hajduk Fred Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:01
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/08; B; B32; B32B; B32B27/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN THE METHOD OF FORMING FLATTENED, TUBULAR THERMOPLASTIC FILM WHEREIN HEATED AND SOFTENED THERMOPLASTIC RESIN IS EXTRUDED THROUGH AN ORIFICE IN THE FORM OF TUBING, A FLUID MEDIUM IS INTRODUCED THEREIN TO EXPAND THE SAME, AND SAID EXPANDED TUBING IS COLLAPSED TO FORM THE FLATTENED PRODUCT, THE IMPROVEMENT WHICH COMPRISES FORMING SAID THERMOPLASTIC FILM IN MATTE FINISHE FORM BY EXTRUDING AN ACRYLIC RESIN SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS OF C2 TO C4 ALKYL ESTERS OF METHACRYLIC ACID AND COPOLYMERS OF A LOWER ALKYL ESTER OF METHACRYLIC ACID WITH A C1 TO C8 ALKYL ACRYLATE, SAID RESIN HAVING A MELT INDEX OF 0.1 TO 3 AND A GLASS TRANSITION TEMPERATURE OF 30* TO 80*C.
Claim 2
Dependent Claim
115 words
IN THE METHOD OF FORMING FLATTENED, TUBULAR THERMOPLASTIC FILM WHEREIN HEATED AND SOFTENED THERMOPLASTIC RESIN IS EXTRUDED THROUGH AN ORIFICE IN THE FORM OF TUBING, A FLUID MEDIUM IS INTRODUCED THEREIN TO EXPAND THE SAME, AND SAID EXPANDED TUBING IS COLLAPSED TO FORM THE FLATTENED PRODUCT, THE IMPROVEMENT WHICH COMPRISES FORMING SAID THERMOPLASTIC FILM IN MATTE FINISHE FORM BY EXTRUDING AN ACRYLIC RESIN SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS OF C2 TO C4 ALKYL ESTERS OF METHACRYLIC ACID AND COPOLYMERS OF A LOWER ALKYL ESTER OF METHACRYLIC ACID WITH A C1 TO C8 ALKYL ACRYLATE, SAID RESIN HAVING A MELT INDEX OF 0.1 TO 3 AND A GLASS TRANSITION TEMPERATURE OF 30* TO 80*C.
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) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |