continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6495/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :24/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : DUAL METALLOCENE CATALYSIS FOR POLYMERISATION OF BIMODAL POLYMERS
(71)Name of Applicant :
(51) International classification :C08F 10/00
1)CHEVRON PHILIPS CHEMICAL COMPANY, LP
(31) Priority Document No :11/359,972
Address of Applicant :10001 SIX PINES DRIVE, THE
(32) Priority Date :22/02/2006
WOODLANDS,TX 77380, USA. U.S.A.
(33) Name of priority country :U.S.A.
(72)Name of Inventor :
(86) International Application No :PCT/US2007/062555
1)YANG, QUING
Filing Date
:22/02/2007
2)JAYARATNE, KUMUDINI, C.
(87) International Publication No :WO 2007/101033
3)JENSEN, MICHAEL D
(61) Patent of Addition to Application
:NA
4)MACDANIEL, MAX P.
Number
:NA
5)MARTIN, JOEL L.
Filing Date
6)THORN, MATTHEW, G.
(62) Divisional to Application Number :NA
7)LANIER, JERRY T.
Filing Date
:NA
8)CRAIN, TONY R.
(57) Abstract :
This invention relates to catalyst compositions, methods, and polymers encompassing at one first Group 4 metallocene compound
comprising bridging ŋ5-cyclopentadienyl-type ligands, in combination with at least one second Group 4 metallocene with nonbridging
ŋ5-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one activator. The
compositions and methods disclosed herein provide ethylene polymers with a bimodal molecular weight distribution.
No. of Pages : 155 No. of Claims : 42
The Patent Office Journal 24/10/2008 25984