| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ffc37a74ecd1aeae4d486a820f5664b9 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B38-009
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J35-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J13-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J13-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B38-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29B9-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J2-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29B9-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J2-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J2-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J35-08 |
| filingDate |
1973-07-30^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1975-04-01^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b089c80219f7336b76121e762b03f126 |
| publicationDate |
1975-04-01^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-3875271-A |
| titleOfInvention |
Hollow pellets and method for making same |
| abstract |
In accordance with the invention, hollow pellets are manufactured by dropping drops of liquid into a bed of powder of the material of which it is desired to make the pellets and preferably also a binder. When the drops of liquid fall into the powder, the powder immediately forms a spherical shell around each drop so as to form the hollow pellets upon vaporization of the liquid. It is preferred that the powder additionally contain some sodium bicarbonate or the like and that the liquid be an aqueous acid solution such that, upon initial formation of the spherical shell of powder, the acid reacts with the sodium bicarbonate to generate carbon dioxide which causes the spherical shell to expand while yet additional powder coalesces onto the shell. The method is particularly useful for the manufacture of ceramic pellets, there being a firing operation on the pellets after removal from the powder bed so as to sinter the ceramic to monolithic structure. The spheres have good mechanical strength particularly in that the inner wall surfaces have a webbed structure and the webbing contributes to the strength. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10161236-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2013134698-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4769189-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3991254-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4111713-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9663708-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9745507-B2 |
| priorityDate |
1973-07-30^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |