CORMA INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B29C SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 6119
 
  
 
B29D PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE 156

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7691317 Method and device for manufacturing a double-walled, thermoplastic tube with a connecting sleeveMar 12, 09Apr 06, 10[B29C, B29D]
7625196 Device for manufacturing a double-walled, thermoplastic tube with a connecting sleeveJul 25, 01Dec 01, 09[B29C]
6576180 Process for the production of corrugated plastic tubesSep 09, 99Jun 10, 03[B29C]
6015282 Apparatus for the production of corrugated plastic tubesMay 19, 98Jan 18, 00[B29C]
5296188 Methods for forming tubing utilizing suction and pneumatic pressure at the surface of the cooling plugSep 10, 92Mar 22, 94[B29C]
5186878 Improvements relating to cooling plugs in thermoplastic pipe forming apparatus and processApr 01, 92Feb 16, 93[B29C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5545369 Clamshell corrugators and the likeExpiredSep 08, 93Aug 13, 96[B29C]
5516482 Travelling mold tunnel apparatus for smooth walled pipeExpiredFeb 08, 93May 14, 96[B29C]
5466402 Gap adjustment of a plastic flow channel in a plastic part forming deviceExpiredMay 13, 94Nov 14, 95[B29C]
5383998 Apparatus for modifying corrugated or ribbed pipe to have a smooth outer wallExpiredMay 13, 94Jan 24, 95[B32B]
5372774 Process of and apparatus for making plastic tubingExpiredNov 02, 92Dec 13, 94[B29C]
5330600 Method of modifying corrugated or ribbed pipe to have a smooth outer wallExpiredNov 17, 92Jul 19, 94[B32B]
5023029 Method and apparatus for producing pipe with annular ribsExpiredSep 11, 89Jun 11, 91[B29C]
5002478 Improvements in suction applying mold blocks in pipe forming apparatusExpiredSep 11, 89Mar 26, 91[B29C]
4995800 Extrusion die assemblyExpiredOct 02, 89Feb 26, 91[B29C]
4983347 Method of producing an internally smooth, externally ribbed tube from extrudable plastic and apparatus for carrying out the methodExpiredJan 04, 90Jan 08, 91[B29C]
4936768 Extrusion die for externally ribbed plastic tubingExpiredMay 01, 89Jun 26, 90[B29C]
4789327 Adjustable pipe extrusion die with internal coolingExpiredFeb 25, 88Dec 06, 88[A21C]
4780165 Method and apparatus for encasing drainage pipesExpiredSep 15, 86Oct 25, 88[B65H]
4770618 Extrusion die for two-ply plastic tubingExpiredJan 15, 86Sep 13, 88[B29C]
4731138 Apparatus for producing double-walled corrugated pipesExpiredApr 23, 87Mar 15, 88[B65H]
4712993 Extrusion die for externally ribbed plastic tubingExpiredMar 25, 86Dec 15, 87[B29C]
4689174 Producing double-walled helically wound thermoplastic pipe with a corrugated cutter wall and a smooth inner wallExpiredOct 08, 86Aug 25, 87[B31F]
4681526 Apparatus for molding thermoplastic pipesExpiredApr 09, 86Jul 21, 87[B29C]
4587874 Rotary punchExpiredJan 19, 84May 13, 86[B26D, B23C, B23D]
4555230 Calibrator for use in the manufacture of double walled thermoplastic pipeExpiredMar 07, 84Nov 26, 85[B29C]

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