CH544320A - Projection screen - Google Patents

Projection screen

Info

Publication number
CH544320A
CH544320A CH415372A CH415372A CH544320A CH 544320 A CH544320 A CH 544320A CH 415372 A CH415372 A CH 415372A CH 415372 A CH415372 A CH 415372A CH 544320 A CH544320 A CH 544320A
Authority
CH
Switzerland
Prior art keywords
projection screen
projection
screen
Prior art date
Application number
CH415372A
Other languages
German (de)
Inventor
Kaps Rainer Dr Dipl-Chem
Naundorf Gerhard Dr Dipl-Ing
Original Assignee
Sika Erzeugnisse Scharfe & Kap
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sika Erzeugnisse Scharfe & Kap filed Critical Sika Erzeugnisse Scharfe & Kap
Publication of CH544320A publication Critical patent/CH544320A/en

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08L9/02—Copolymers with acrylonitrile
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
    • C08L61/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08L61/22—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C08L61/24—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with urea or thiourea
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Overhead Projectors And Projection Screens (AREA)
CH415372A 1971-06-09 1972-03-21 Projection screen CH544320A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD15564171 1971-06-09

Publications (1)

Publication Number Publication Date
CH544320A true CH544320A (en) 1973-11-15

Family

ID=5483925

Family Applications (1)

Application Number Title Priority Date Filing Date
CH415372A CH544320A (en) 1971-06-09 1972-03-21 Projection screen

Country Status (5)

Country Link
CH (1) CH544320A (en)
DE (1) DE2212998A1 (en)
FR (1) FR2141041A5 (en)
SE (1) SE372110B (en)
SU (1) SU496750A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5877255A (en) * 1996-03-27 1999-03-02 Sika Ag Vorm. Kaspar Winkler & Co. Kind of polyhydroxyl compounds suitable for the polyurethane synthesis

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5877255A (en) * 1996-03-27 1999-03-02 Sika Ag Vorm. Kaspar Winkler & Co. Kind of polyhydroxyl compounds suitable for the polyurethane synthesis

Also Published As

Publication number Publication date
SU496750A3 (en) 1975-12-25
DE2212998A1 (en) 1973-02-01
FR2141041A5 (en) 1973-01-19
SE372110B (en) 1974-12-09

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Legal Events

Date Code Title Description
PL Patent ceased