Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/16—Nitrogen-containing compounds
  • C08K5/34—Heterocyclic compounds having nitrogen in the ring
  • C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
  • C08K5/3415—Five-membered rings
  • C08K5/3417—Five-membered rings condensed with carbocyclic rings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
  • B29D11/00—Producing optical elements, e.g. lenses or prisms
  • B29D11/00634—Production of filters
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
  • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
  • G02B1/041—Lenses
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B5/00—Optical elements other than lenses
  • G02B5/20—Filters
  • G02B5/22—Absorbing filters
  • G02B5/23—Photochromic filters
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C1/00—Photosensitive materials
  • G03C1/685—Compositions containing spiro-condensed pyran compounds or derivatives thereof, as photosensitive substances

Landscapes

• Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Health & Medical Sciences (AREA)
• Polymers & Plastics (AREA)
• Medicinal Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• Materials Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Ophthalmology & Optometry (AREA)
• Mechanical Engineering (AREA)
• Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
• Eyeglasses (AREA)
• Optical Filters (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=23205794

Family Applications (1)

Country Status (11)

Families Citing this family (5)

• 1973
  • 1973-09-12 IL IL43211A patent/IL43211A0/xx unknown
  • 1973-09-15 DE DE19732347018 patent/DE2347018A1/de active Pending
  • 1973-09-20 AR AR250193A patent/AR198117A1/es active
  • 1973-09-27 GB GB4529973A patent/GB1418089A/en not_active Expired
  • 1973-10-12 AU AU61333/73A patent/AU6133373A/en not_active Expired
  • 1973-10-16 IT IT53158/73A patent/IT997765B/it active
  • 1973-10-23 AT AT897573A patent/ATA897573A/de not_active Application Discontinuation
  • 1973-11-26 BR BR9247/73A patent/BR7309247D0/pt unknown
  • 1973-11-29 FR FR7343536A patent/FR2211666A1/fr not_active Withdrawn
  • 1973-11-30 NL NL7316400A patent/NL7316400A/xx unknown
  • 1973-11-30 JP JP48133642A patent/JPS4989551A/ja active Pending

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