Inventor

ALT HELMUT G

DE87 patents

⚠️ This page may combine multiple inventors who share the name “ALT HELMUT G”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ALT HELMUT G

PHILLIPS PETROLEUM CO

Metallocene preparation and use

Metallocene compounds and preparation thereof containing terminal alkynes

Organometallic fluorenyl compounds and use thereof in an alpha-olefin polymerization process

Vinly-substituted bridged metallocenes

Method for making and using a supported metallocene catalyst system

Metallocenes and processes therefor and therewith

Organometallic fluorenyl compounds, preparation, and use

Metallocenes and processes therefor and therewith

Fluorene compounds

Cyclopentadiene type compounds and method for making

Process of polymerizing olefins using diphenylsilyl or dimethyl tin bridged 1-methyl fluorenyl metallocenes

Cyclopentadienyl-type ligands, metallocenes, catalyst systems, preparation, and use

Process for preparing cyclopentadienyl-type ligands

High activity ethylene selective metallocenes

Organometallic fluorenyl compounds, preparation, and use

Method for preparing cyclopentadienyl-type ligands and metallocene compounds

Olefin polymerization using silyl-bridged metallocenes

Metallocenes, polymerization catalyst systems, their preparation, and use

Method for producing polymer of ethylene

Olefin polymerization

Complexes of pyridldiimines with vanadium and other transition metals, and their use as olefin oligomerization and polymerization catalysts

Process for producing an olefin polymer using a metallocene

Process to prepare polymeric metallocenes

Method for making and using a supported metallocene catalyst system

Organometallic fluorenyl compounds and use thereof in olefin polymerization

Polymerization processes

Polymer bound metallocenes

Polymer bound ligands, polymer bound metallocenes, catalyst systems, preparation, and use

Substituted indenyl unbridged metallocenes

Polyethylenes containing a unique distribution of short chain branching

(Omega-alkenyl) (cyclopentacarbyl) metallocene compounds

Processes to produce metallocene compounds and polymerization processes therewith

Polymerization catalyst systems, their preparation, and use

Polymerization catalysts and processes therefor

Organoaluminoxy product, catalyst systems, preparation, and use

Unbridged metallocenes of 9-substituted fluorenyl compounds and use thereof

Multicyclic metallocycle metallocenes and their use

Aryl substituted metallocene catalysts and their use

Unsymmetric unbridged bis-indenyl metallocenes and their use

Process for preparing a bridged ligand and said bridged ligand

Metallocenes and processes therefor and therewith

Process for preparing polymer bound metallocenes

Polymer bound ligands

Syndiotactic polypropylene prepared using silyl bridged metallocenes

Cyclopentadiene type compounds and method for making

Cyclopentadiene type compounds and method for making

Catalyst systems and polymerization processes

Organometallic fluorenyl compounds, preparation, and use

(unassigned)

Bridged fluorenyl/indenyl metallocenes and the use thereof

PHILLIPS POTROLEUM COMPANY

Organometallic fluorenyl compounds, preparations, and use