HK10594A - Method of rendering documents resistant to photocopying,and anti-copying paper - Google Patents

Method of rendering documents resistant to photocopying,and anti-copying paper

Info

Publication number
HK10594A
HK10594A HK105/94A HK10594A HK10594A HK 10594 A HK10594 A HK 10594A HK 105/94 A HK105/94 A HK 105/94A HK 10594 A HK10594 A HK 10594A HK 10594 A HK10594 A HK 10594A
Authority
HK
Hong Kong
Prior art keywords
photocopying
copying paper
rendering documents
resistant
documents resistant
Prior art date
Application number
HK105/94A
Inventor
Norman A Gardner
Michael P Voticky
Original Assignee
Nocopi Int Inc
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
Priority claimed from CA000378239A external-priority patent/CA1187914A/en
Application filed by Nocopi Int Inc filed Critical Nocopi Int Inc
Publication of HK10594A publication Critical patent/HK10594A/en

Links

Classifications

    • 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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/08—Photoprinting; Processes and means for preventing photoprinting
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/04—Preventing copies being made of an original
    • G03G21/043—Preventing copies being made of an original by using an original which is not reproducible or only reproducible with a different appearence, e.g. originals with a photochromic layer or a colour background
HK105/94A 1981-05-25 1994-02-02 Method of rendering documents resistant to photocopying,and anti-copying paper HK10594A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CA000378239A CA1187914A (en) 1981-05-25 1981-05-25 Method of rendering documents resistant to photocopying, and anti-copying paper therefor
US06/443,819 US4522429A (en) 1981-05-25 1982-11-23 Method of rendering documents resistant to photocopying, and anti-copying paper and ink therefor
EP19820306493 EP0111597B1 (en) 1981-05-25 1982-12-06 Method of rendering documents resistant to photocopying, and anti-copying paper
AU91302/82A AU555754B2 (en) 1981-05-25 1982-12-07 Photocopy resistant paper
US06/475,791 US4632429A (en) 1981-05-25 1983-03-16 Method of rendering documents resistant to photocopying and anti-copying paper therefor

Publications (1)

Publication Number Publication Date
HK10594A true HK10594A (en) 1994-02-09

Family

ID=46229985

Family Applications (1)

Application Number Title Priority Date Filing Date
HK105/94A HK10594A (en) 1981-05-25 1994-02-02 Method of rendering documents resistant to photocopying,and anti-copying paper

Country Status (4)

Country Link
JP (1) JPS59114566A (en)
AT (1) ATE54495T1 (en)
HK (1) HK10594A (en)
IN (1) IN161293B (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2385161A1 (en) * 1977-02-08 1978-10-20 Burroughs Corp MEANS OF PROTECTION OF DOCUMENTS AND DOCUMENTS THUS REALIZED
JPS5452538A (en) * 1977-10-04 1979-04-25 Fuji Xerox Co Ltd Transfer paper for preventing reecopying and production thereof
JPS5487742U (en) * 1977-12-05 1979-06-21
JPS5541434A (en) * 1978-09-20 1980-03-24 Konishiroku Photo Ind Co Ltd Retrofocus type wide angle lens
JPS576113A (en) * 1980-06-11 1982-01-13 Akira Kobayashi Ceiling hanging metals

Also Published As

Publication number Publication date
ATE54495T1 (en) 1990-07-15
JPS59114566A (en) 1984-07-02
IN161293B (en) 1987-11-07
JPH0458033B2 (en) 1992-09-16

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)