The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 11, 1997
Filed:
Aug. 09, 1994
Richard A Murray, San Diego, CA (US);
Dan J Dull, San Diego, CA (US);
Encad, Inc., San Diego, CA (US);
Abstract
A printer ink cartridge includes a rigid cartridge body containing ink, a plurality of ink orifices, a jet plate, a plurality of electrical conductors, a control and driver circuit and a memory storage element. The memory storage element is connected to the control and driver circuit to enable information to be retrieved and stored from the memory storage element. The memory storage element is capable of storing information regarding the printer ink cartridge and the ink stored within the cartridge selected, such as ink type, ink color, date of manufacture of the cartridge, data from a spectral analysis of the ink, initial amount of ink stored in the cartridge body, amount of ink delivered, and amount of ink remaining in the cartridge. The memory storage element can be an EEPROM or a flash memory. The control and driver circuit may also include a counter for counting the number of times the heating elements on the cartridge are energized. The approximate number of times the heating elements have been energized indicates the approximate number of drops of ink that have applied by the cartridge.