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:
May. 04, 1999
Filed:
Mar. 14, 1997
Applicant:
Inventor:
Rick L Chapman, Oak View, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ;
U.S. Cl.
CPC ...
428198 ; 442 36 ; 442392 ; 442400 ; 156 731 ; 156290 ; 1563082 ;
Abstract
Electrostatic fibers with high efficiency for small particles and low pressure drop are formed by spot laminating an assembly of a stack of at least 2 layers of thermoplastic, electrostatic, non-woven media having lightweight scrims disposed on each end face of the stack between the nip of a roller with a pattern of raised dots and a heated roller or ultrasonic generator.