KOHJIN CO., LTD.
62Patents
1Active
62Granted
38Portfolio score
Filing activity: Jun 23, 1972 → Mar 26, 2009 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5376392A | Food packaging bag | Emerging Cross-Sectional Technologies | 71 | Expired |
| US4543280A | Heat resistant ovenable paperboard | Emerging Cross-Sectional Technologies | 37 | Expired |
| US4652490A | Heat shrinkable laminated packaging material | Emerging Cross-Sectional Technologies | 33 | Expired |
| US4354997A | Heat shrinkable film and process for preparing the same | Chemistry; Metallurgy | 31 | Expired |
| US4127698A | Composite fiber | Emerging Cross-Sectional Technologies | 28 | Expired |
| US5132074A | Process of making stretchable, heat shrinkable polyethylene film | Chemistry; Metallurgy | 28 | Expired |
| US4968464A | Process for producing a porous resin film | Chemistry; Metallurgy | 27 | Expired |
| US3985849A | Preparation of biaxially oriented polyvinyl alcohol film | Performing Operations; Transporting | 27 | Expired |
| US4801652A | Heat shrinkable film | Chemistry; Metallurgy | 26 | Expired |
| US4463153A | Heat shrinkable film and process for preparing the same | Chemistry; Metallurgy | 22 | Expired |
| US5620803A | Heat shrinkable polypropylene laminate film | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5759675A | Multi-layer stretchable, shrinkable polyethylene film and process for the preparation thereof | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4987118A | High-grade thermal recording sheet and a method of making the same | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5049159A | Deodorizing material and process for producing the same: cellulose fibers treated with copper hydroxide or zinc hydroxide colloid solution | Textiles; Paper | 17 | Expired |
| US4003973A | Process and apparatus for producing sheet film from tubular thermoplastic resin film | Performing Operations; Transporting | 17 | Expired |
| US5518119A | Heat-seal package and method of packaging | Performing Operations; Transporting | 17 | Expired |
| US5306549A | Biaxially stretched polyethylene film | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4547571A | Process for preparing carboxymethyl ethyl cellulose suitable for enteric coating | Chemistry; Metallurgy | 15 | Expired |
| US6352762B1 | Easily adhesive polyamide film | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5498409A | Material for adsorbing pyrogen | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4250305A | Process for preparing cellulose ether | Chemistry; Metallurgy | 10 | Expired |
| US4746697A | Antistatic resin composition | Chemistry; Metallurgy | 9 | Expired |
| US4606951A | Water-resisting and oil-resisting laminated sheet | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5691049A | Heat shrinkable polyolefin laminate film | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5126211A | Biaxially oriented polyamide film and method for producing the same | Emerging Cross-Sectional Technologies | 8 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.