Inventor
Sheldon J. Shafer
Inventor
Clifton Park, NY, US
Overview
Patents· 36 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Cprimary
C07CAcyclic or carbocyclic compounds36%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds22%
C08LCompositions of macromolecular compounds10%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry8%
Y02PClimate change mitigation technologies in the production or processing of goods6%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients4%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form2%
C08JWorking-up2%
C09KMaterials for miscellaneous applications, not provided for elsewhere2%
C22BProduction and refining of metals2%
PatentTitleYear
8,218,291'Monomers for preparing polycarbonate resins, methods of preparing the monomers, polycarbonate resins prepared with the monomers, and capacitors comprising the polycarbonate resins'20127,371,902'Methods for purifying p,p-bisphenol-A'20087,230,066'Polycarbonate—ultem block copolymers'20077,211,641'Liquid crystal polycarbonates and methods of preparing same'20076,680,270'Regeneration of catalysts used in the manufacture of bisphenols'20046,486,222'Combination ion exchange resin bed for the synthesis of bisphenol A'20026,303,835'Method for recovering material values from bisphenol tars'20015,981,788'Method for recovering and recycling catalyst constituents'19995,908,952'Method for preparing diaryl carbonates employing .beta.-diketone salts'19995,898,079'Method for preparing diaryl carbonates employing hexaalkylguanidinium halides'19995,898,080'Method for preparing diaryl carbonates employing hexaalkylguanidinium halides'19995,760,272'Method for preparing diaryl carbonates with improved selectivity'19985,756,801'Method of purifying diphenyl carbonate-phenol adduct'19985,723,689'Process for recovering bisphenols'19985,516,855'Amide-ester copolymers and process for the preparation thereof'19965,428,075'Method for regenerating a sulfonated aromatic organic polymeric ion-exchange resin bed having deactivated aminoorganomercaptan groups with phenol'19955,414,151'Method for making bisphenol'19955,340,885'Amide-ester copolymers and process for the preparation thereof'19945,336,814'Method for recovering bis hydroxy aromatic organic values and bis aryl carbonate values from scrap aromatic polycarbonate'19945,312,955'Method for making aromatic organic carbonates'19945,280,088'Thermoplastic blends of a polyamide having low amine end-group concentration and a polymer containing carbonate linkages'19945,239,106'Method of recovering and purifying diphenylcarbonate from phenolic solutions thereof'19935,089,600'Amide-urea copolymer and process for the preparation thereof'19925,070,177'Ultraviolet radiation resistant polyphthalatecarbonate resin'19915,019,641'Polyamide from 1,3 propylene diamine and isophthalic acid compound'19914,983,718'Color minimization during melt preparation of polyamides with hypophosphorus acid'19914,973,746'Process for converting pet scrap to diamine monomers'19904,937,130'Polycarbonate container having internal layers of amorphous polyamide'19904,918,149'Polyphthalatecarbonate/polycarbonate resin blends'19904,876,317'Amide-urea copolymer and process for the preparation thereof'19894,788,249'Thermoplastic resins and polyamides compatibilized with polyamide-polyester block copolymers'19884,788,248'Thermoplastic resins and polyamides compatibilized with polyamide-polyarylate block copolymers'19884,697,034'Process for making diaryl carbonates'19874,567,249'Melt preparation of polyamide by amide ester interchange'19864,407,996'Stabilized polycarbonate compositions'19834,362,829'Polycarbonates stabilized with sulfolane derivatives'1982Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1982–2012Patents assigned to GEN ELECTRIC (36)· patent assignee history
1982–1996Based in Pittsfield, MA, US· patent location history
1989–1992Based in Phoenix, AZ, US· patent location history
1994–2012Based in Clifton Park, NY, US· patent location history
2012Patents assigned to CAO YANG (1)· patent assignee history
2012Patents assigned to DAVIS GARY CHARLES (1)· patent assignee history
2012Patents assigned to IRWIN PATRICIA CHAPMAN (1)· patent assignee history
2012Patents assigned to LEE JULIA LAM (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| GEN ELECTRIC | 36 | 1982–2012 |
| CAO YANG | 1 | 2012 |
| DAVIS GARY CHARLES | 1 | 2012 |
| IRWIN PATRICIA CHAPMAN | 1 | 2012 |
| LEE JULIA LAM | 1 | 2012 |
Locations
| Location | Patents | Span |
|---|---|---|
| Clifton Park, New York, US | 17 | 1994–2012 |
| Pittsfield, Massachusetts, US | 17 | 1982–1996 |
| Phoenix, AZ, US | 2 | 1989–1992 |