ES252684A1 - Improvements introduced in the manufacture of thermographic copy sheets (Machine-translation by Google Translate, not legally binding)
- Google Patents
Improvements introduced in the manufacture of thermographic copy sheets (Machine-translation by Google Translate, not legally binding)
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.)
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
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Filing date
Publication date
Application filed by Minnesota Mining and Manufacturing CofiledCriticalMinnesota Mining and Manufacturing Co
Publication of ES252684A1publicationCriticalpatent/ES252684A1/en
Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography
(AREA)
Abstract
Improvements introduced in the manufacture of thermographic copy sheets comprising a material that chemically reacts upon being heated, to undergo a visible change and a substantial amount of particles of a solid material, inert, hard, stable and normally transparent, interdispersed and masking the reactant material, said inert material being fusible upon being heated to form a permanently transparent matrix surrounding and discovering the product of the reaction. (Machine-translation by Google Translate, not legally binding)
ES0252684A1958-10-201959-10-15Improvements introduced in the manufacture of thermographic copy sheets (Machine-translation by Google Translate, not legally binding)
ExpiredES252684A1
(en)
Procedure for the recovery of tungsten of materials containing it, mainly in the form of tungstate and tungsten carbide (Machine-translation by Google Translate, not legally binding)
A procedure for the preparation of a granular pesticide composition of substantially reduced volatility. (Machine-translation by Google Translate, not legally binding)
Procedure for preparing thermoplastic compounds of high thermal and mechanical properties (Machine-translation by Google Translate, not legally binding)
Procedure for mixing sulfur trioxide with a gas through formation of granules or pellets. (Machine-translation by Google Translate, not legally binding)