GB2194645B - Positive - acting thermographic materials - Google Patents

Positive - acting thermographic materials

Info

Publication number: GB2194645B
Authority: GB; United Kingdom
Prior art keywords: acting; positive; thermographic materials; thermographic; materials
Prior art date: 1986-08-14
Legal status (The legal status 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 status listed.): Expired - Lifetime

Application number

GB8719289A

Other versions

GB8719289D0 (en

GB2194645A (en

Inventor

David Robert Whitcomb

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

3M Co

Original Assignee

Minnesota Mining and Manufacturing Co

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.)

1986-08-14

Filing date

1987-08-14

Publication date

1990-02-14

1987-08-14 Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co

1987-09-23 Publication of GB8719289D0 publication Critical patent/GB8719289D0/en

1988-03-09 Publication of GB2194645A publication Critical patent/GB2194645A/en

1990-02-14 Application granted granted Critical

1990-02-14 Publication of GB2194645B publication Critical patent/GB2194645B/en

2007-08-14 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/28—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating

Landscapes

Physics & Mathematics (AREA)
Optics & Photonics (AREA)
Heat Sensitive Colour Forming Recording (AREA)
Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

GB8719289A 1986-08-14 1987-08-14 Positive - acting thermographic materials Expired - Lifetime GB2194645B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US89676386A	1986-08-14	1986-08-14

Publications (3)

Publication Number	Publication Date
GB8719289D0 GB8719289D0 (en)	1987-09-23
GB2194645A GB2194645A (en)	1988-03-09
GB2194645B true GB2194645B (en)	1990-02-14

Family

ID=25406783

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB8719289A Expired - Lifetime GB2194645B (en)	1986-08-14	1987-08-14	Positive - acting thermographic materials

Country Status (3)

Country	Link
JP (1)	JPS6348385A (en)
DE (1)	DE3722731A1 (en)
GB (1)	GB2194645B (en)

1987
- 1987-07-09 DE DE19873722731 patent/DE3722731A1/en not_active Withdrawn
- 1987-08-13 JP JP20260387A patent/JPS6348385A/en active Pending
- 1987-08-14 GB GB8719289A patent/GB2194645B/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
GB8719289D0 (en)	1987-09-23
DE3722731A1 (en)	1988-02-18
JPS6348385A (en)	1988-03-01
GB2194645A (en)	1988-03-09

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Legal Events

Date	Code	Title	Description
1989-06-07	732	Registration of transactions, instruments or events in the register (sect. 32/1977)
2000-04-05	PCNP	Patent ceased through non-payment of renewal fee	Effective date: 19990814