Inventor · disambiguated record
Seiichiro Ima
Also filed as: IMA SEIICHIRO
19 granted patents·335 citations·filing 1979–2000
95Inventor score
Files withSUMITOMO CHEMICAL CO19
Top patents by PatentIndex Score
19 records- 0191US5115027APolypropylene stretched filmSUMITOMO CHEMICAL CO·Filed 1991·Granted May 19, 1992·44 cites·1 claims
- 0288US5641828APolypropylene compositions and film thereofSUMITOMO CHEMICAL CO·Filed 1995·Granted Jun 24, 1997·63 cites·14 claims
- 0386US4603174AStretched polypropylene filmSUMITOMO CHEMICAL CO·Filed 1984·Granted Jul 29, 1986·37 cites·5 claims
- 0477US6057413APropylene-ethylene random copolymer filmSUMITOMO CHEMICAL CO·Filed 1996·Granted May 2, 2000·35 cites·3 claims
- 0575US4786562APolypropylene multi-layer filmSUMITOMO CHEMICAL CO·Filed 1987·Granted Nov 22, 1988·30 cites·8 claims
- 0672US4283463AMolded products of polypropyleneSUMITOMO CHEMICAL CO·Filed 1979·Granted Aug 11, 1981·12 cites·21 claims
- 0765US6667375B1Ethylene-α-olefin copolymer and polyethylene compositionSUMITOMO CHEMICAL CO·Filed 2000·Granted Dec 23, 2003·7 cites·4 claims
- 0864US4355144AProcess for producing a propylene-ethylene copolymer having improved stretchabilitySUMITOMO CHEMICAL CO·Filed 1981·Granted Oct 19, 1982·12 cites·3 claims
- 0959US5654372APolypropylene composition and the film thereofSUMITOMO CHEMICAL CO·Filed 1996·Granted Aug 5, 1997·18 cites·12 claims
- 1055US4769284APolypropylene multi-layer filmSUMITOMO CHEMICAL CO·Filed 1986·Granted Sep 6, 1988·25 cites·11 claims
- 1152US5340878APolypropylene composition and film thereofSUMITOMO CHEMICAL CO·Filed 1993·Granted Aug 23, 1994·11 cites·11 claims
- 1248US4433110AProcess for producing propylene block copolymersSUMITOMO CHEMICAL CO·Filed 1981·Granted Feb 21, 1984·12 cites·5 claims
- 1343US4414373APropylene-ethylene copolymer having improved stretchabilitySUMITOMO CHEMICAL CO·Filed 1982·Granted Nov 8, 1983·4 cites·3 claims
- 1442US6451936B1Polypropylene random copolymer and film thereofSUMITOMO CHEMICAL CO·Filed 1995·Granted Sep 17, 2002·6 cites·13 claims
- 1535US5726269APolypropylene filmSUMITOMO CHEMICAL CO·Filed 1996·Granted Mar 10, 1998·4 cites·19 claims
- 1633US5019442AOverlay filmsSUMITOMO CHEMICAL CO·Filed 1989·Granted May 28, 1991·7 cites·16 claims
- 1732US4839234APolypropylene filmSUMITOMO CHEMICAL CO·Filed 1987·Granted Jun 13, 1989·5 cites·5 claims
- 1831US4927872APolypropylene filmSUMITOMO CHEMICAL CO·Filed 1989·Granted May 22, 1990·1 cites·5 claims
- 1930US4584239AStretched multilayer polypropylene filmSUMITOMO CHEMICAL CO·Filed 1985·Granted Apr 22, 1986·2 cites·6 claims
Join the waitlist — get patent alerts
Get an alert when Seiichiro Ima files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →