David W Rowan

US Patent:

39444198, Mar 16, 1976

Filed:

Jan 30, 1975

Appl. No.:

5/545682

Inventors:

Alfred I. Bigatel - Allentown PA
Quentin T. Jarrett - Wescosville PA
Ronald A. Petskus - Bethlehem PA
David C. Rowan - Allentown PA
Joseph M. Scheetz - Whitehall PA

Assignee:

Western Electric Co., Inc. - New York NY

International Classification:

G03C 504

US Classification:

96 27R

Abstract:

To avoid damaging photolithographic masks and photoresist coatings on articles during selective exposure of the photoresist coatings, the mask is held very near to, but not in contact with, the photoresist coating during the selective exposure. Because of the close spacing involved, such a technique is commonly termed "proximity printing. " To provide suitable spacers for holding a mask in uniform proximity with a photoresist coating, a plurality of droplets of a liquid acrylic resin are dispensed onto the mask and cured in air to harden them. For proximity printing, the mask is simply pressed against the photoresist coating with the droplets therebetween and light of sufficient wavelength and intensity is directed selectively onto the coating through the mask for a sufficient time.

US Patent:

20190016877, Jan 17, 2019

Filed:

May 2, 2018

Appl. No.:

15/969253

Inventors:

- Easton PA, US
David E. Rowan - Bethlehem PA, US
Michael L. Spera - Mohnton PA, US

Assignee:

Crayola LLC - Easton PA

International Classification:

C08L 29/04
C08L 3/02
C08K 3/38
C08K 3/26
C08K 3/22
C08K 5/053

Abstract:

The present invention provides moldable compositions that are capable of resisting slumping and cracking when allowed to dry and harden. Embodiments of the moldable composition comprise water, fillers including arrowroot and kaolin clay, at least one polar polymeric resin (e.g., polyvinyl alcohol), at least one thickening agent (e.g., ammonium pentaborate tetrahydrate), one or more pH adjusters (e.g., triethanolamine, sodium bicarbonate), a humectant (e.g., propylene glycol, glycerin), optionally at least one releasing agent (e.g., mineral oil), and optionally at least one additive.

US Patent:

20170058109, Mar 2, 2017

Filed:

Aug 26, 2016

Appl. No.:

15/248706

Inventors:

- Easton PA, US
Michael G. MOSKAL - Pottstown PA, US
David ROWAN - Easton PA, US
Michael L. SPERA - Mohnton PA, US
James Broe FITZPATRICK - Kensington MD, US

Assignee:

Crayola LLC - Easton PA

International Classification:

C08L 3/02

Abstract:

The present invention provides moldable compositions that are capable of drying and hardening if left in open air at room temperature for a period of time. Embodiments of the moldable compositions comprise water, at least one polar polymeric resin (e.g., polyvinyl alcohol), at least one thickening agent (e.g., boric acid, borate salt, or hydrate of a borate salt), at least one humectant (e.g., glycerin, propylene glycol, etc.), at least one filler (e.g., corn starch, tapioca, or arrowroot), optionally at least one releasing agent (e.g., mineral oil) and optionally at least one additive.