Inventor

Ruth C. Bilofsky

Inventor

Lexington, MA, US

Overview

12→

Patents

1976–1985

Patent span

Physics

Primary field (CPC G)

Patents· 12 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G03Cprimary

G03CPhotosensitive materials for photographic purposes42%

G02BOptical elements, systems or apparatus21%

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments11%

Y10TTechnical subjects covered by former us classification11%

C07CAcyclic or carbocyclic compounds5%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium5%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%

PatentTitleYear

4,525,413'Optical device including birefringent polymer'1985 4,521,588'Optical device including birefringent polyhydrazide polymer'1985 4,520,189'Optical device including birefringent aromatic amino carboxylic acid polymer'1985 4,446,305'Optical device including birefringent polymer'1984 4,415,648'Variable density photographic transparencies'1983 4,386,216'Magenta dye developers'1983 4,288,524'Image-receiving elements utilizing lamellar pigment materials'1981 4,279,983'Silver image stabilization'1981 4,269,916'Photographic prints utilizing lamellar pigment materials'1981 4,264,701'Magenta dye developers'1981 4,216,018'Photographic products and processes employing lamellar pigments'1980 3,932,455'Carbazole phthaleins'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1985Patents assigned to POLAROID CORP (12)· patent assignee history

1976Based in Arlington, MA, US· patent location history

1980–1985Based in Lexington, MA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
POLAROID CORP	12	1976–1985

Locations

Location	Patents	Span
Lexington, Massachusetts, US	11	1980–1985
Arlington, Massachusetts, US	1	1976