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Inventor

Peter W. Ranby

Inventor
Harrow Weald, GB

Overview

5→
Patents
1977–1990
Patent span
Chemistry
Primary field (CPC C)

Patents· 5 as inventor

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

C09Kprimary
C09KMaterials for miscellaneous applications, not provided for elsewhere50%
H01JElectric discharge tubes or discharge lamps38%
Y10TTechnical subjects covered by former us classification13%
PatentTitleYear
4,914,723'Fluorescent lamp discharge tube having electrostatically coated envelope'19904,446,048'Luminescent materials'19844,396,863'Synthetic willemite phosphors and fluorescent lamp containing the same'19834,096,088'Method of preparing cerium and terbium activated aluminate phosphors'19784,026,816'Cerium and terbium activated aluminate phosphors'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1978Patents assigned to THORN ELECTRICAL IND LTD (2)· patent assignee history
1977–1978Based in London, GB· patent location history
1983–1984Patents assigned to THORN EMI LTD (2)· patent assignee history
1983–1990Based in Harrow Weald, GB· patent location history
1984Based in Middlesex, GB· patent location history
1990Patents assigned to EMI PLC THORN (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
THORN ELECTRICAL IND LTD21977–1978
THORN EMI LTD21983–1984
EMI PLC THORN11990
Locations
LocationPatentsSpan
Harrow Weald, GB21983–1990
London, GB21977–1978
Middlesex, GB11984