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Inventor

Paul Kreienbuhl

Inventor
Riehen, CH

Overview

5→
Patents
1989–2000
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.

C07Cprimary
C07CAcyclic or carbocyclic compounds36%
A23KFodder18%
F02GHot gas or combustion-product positive-displacement engine plants18%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests18%
C07DHeterocyclic compounds9%
PatentTitleYear
6,150,561'Method of making carotenoids'20006,066,745'Process for the synthesis of vitamin E'20005,670,548'Pigmentation with carotenoids'19975,605,699'Pigmentation with carotenoids'19974,883,887'Sulfone polyene intermediates'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–1997Patents assigned to HOFFMANN LA ROCHE (2)· patent assignee history
1989–2000Based in Riehen, CH· patent location history
1997–2000Patents assigned to ROCHE VITAMINS INC (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ROCHE VITAMINS INC31997–2000
HOFFMANN LA ROCHE21989–1997
Locations
LocationPatentsSpan
Riehen, CH51989–2000