Predicate |
Object |
assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_05ff905fdc49089f5f25746eaeb40190 |
classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C35-0222 |
classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F271-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B1-043 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29D11-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29D11-00067 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29D11-00134 |
classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C35-02 |
classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29D11-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B1-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F271-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61L15-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61L15-22 |
filingDate |
1972-08-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
grantDate |
1974-10-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0331ed4fbdf99c182f125df48fb3f82a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a7ff9505248d8e175cf4cc861f8d77d9 |
publicationDate |
1974-10-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
publicationNumber |
US-3841985-A |
titleOfInvention |
Irradiated composition for soft contact lens |
abstract |
1. A HYDROSCOPIC POLYMERIZED AND IRRADIATED COMPOSITION ADAPTED TO BE SWOLLEN BY WATER TO MAKE A SOFT CONTACT LENS CONSISTING ESSENTIALLY OF 20-45% OF A HIGH MOLECULAR WEIGHT SOLID POLYVINYL PYRROLIDONE ONTO WHICH IS GRAFT POLYMERIZED 80-55% OF MONOMETHACRYLATE ESTER OF A GLYCOL SELECTED FROM THE GROUP CONSISTING OF ETHYLENE GLYCOL, PROPYLENE GLYCOL, DIETHYLENE GLYCOL AND DIPROPYLENE GLYCOL, THERE BEING PRESENT LESS THAN 1% METHACRYLIC ACID AND LESS THAN 0.2% DIMETHACRYLATE AS IMPURITIES IN SAID ESTER WHICH IS INITIATED IN STATIC CONDITION AT 40-60* C. FOR 4-24 HOURS WITH LOW TEMPERATURE FREE-RADICAL INITIATOR SELECTED FROM THE GROUP CONSISTING OF DISECONDARY BUTYL PEROXY DICARBONATE, PYRROLIDONE ACETYL PEROXIDE AND CYCLOHEXANONE PEROXIDE IN A CONCENTRATION OF ABOUT 0.1% BY WEIGHT OF SAID ESTER AND POLYVINYLPYRROLIDONE AND FURTHER POLYMERIZED AT 90-120*C FOR 1/2 TO 2 HOURS WITH MEDIUM TEMPERATURE FREE-RADICAL INITIATOR SELECTED FROM THE GROUP CONSISTING OF BENXOYL PEROXIDE, DIETHYL PEROXIDE, AZOISOBUTYRONITRILE AND ORTHOTOLYL PEROXIDE IN A CONCENTRATION OF ABOUT 0.1% BY WEIGHT OF SAID ESTER AND POLYVINYL PYRROLIDONE, SAID COMPOSITION BEING SUBSTANTIALLY IRRADIATED UNDER HIGH ENERGY 250 WATT ULTRAVOILET RADIATION OF WAVELENGTH 2000-4000 ANGSTROMS FOR 1/2 TO 4 HOURS OF X-RAYS AT A DOSAGE 10**7 ROENTGENS FOR 15 MINUTES TO 1 HOUR OR UNDER GAMMA RAYS IN A DOSAGE OF 5 TO 95 MEGARADS FOR 5 MINUTES TO 1 HOUR. D R A W I N G |
isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7511083-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4761436-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9052529-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10267952-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4929692-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5002978-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5075106-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006052478-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007010595-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4978713-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4871490-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4994504-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4729892-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5210111-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11150383-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-100465202-C http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4931228-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9395559-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2004052632-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7841716-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2004031253-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4826889-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-3203655-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4279795-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4158030-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004091613-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8696115-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4933408-A |
priorityDate |
1969-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
type |
http://data.epo.org/linked-data/def/patent/Publication |