US2741561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
das gupta
Assignee: —
•
Filing: —
•
Granted: 1956-04-10
•
Expires: 1973-04-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:48
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218; H01G4/1227; C; C04; C04B; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3212; C04B2235/3215; C04B2235/3217; C04B2235/3231; C04B2235/3232; C04B2235/3234; C04B2235/3236; C04B2235/34; C04B2235/3418; C04B2235/36; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5445
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
32 words
A CERAMIC FOR A CAPACITOR CONSISTING ESSENTIALLY OF, BY WEIGHT, 5 TO 15 PER CENT ZIRCONIUM OXIDE, 56.5 TO 91 PER CENT MAGNESIUM TITANATE AND 2 TO 36.5 PER CENT CALCIUM TITANATE.
Claim 2
Dependent Claim
32 words
A CERAMIC FOR A CAPACITOR CONSISTING ESSENTIALLY OF, BY WEIGHT, 5 TO 15 PER CENT ZIRCONIUM OXIDE, 56.5 TO 91 PER CENT MAGNESIUM TITANATE AND 2 TO 36.5 PER CENT CALCIUM TITANATE.
Claim 3
Dependent Claim
158 words
THE PROCESS OF PRODUCING A LOW DIELECTRIC CERAMIC FOR A CAPACITOR CONSISTING ESSENTIALLY OF, BY WEIGHT, 5 TO 15 PER CENT ZIRCONIUM OXIDE, 56.5 TO 91 PER CENT MAGNESIUM TITANATE AND 2 TO 36.5 PER CENT CALCIUM TITANATE, THE SAID PROCESS COMPRISING MIXING 99 PER CENT PURE CALCIUM CARBONATE, MAGNESIUM CARBONATE, TITANIUM OXIDE, PURE ZIRCONIUM OXIDE AND CLAY FROM WHICH IMPURITIES HAVE BEEN REMOVED, THE SAID COMPONENTS HAVING A PARTICLE SIZE FINER THAN 320 MESH; WET BALL MILLING THE MIX TO PRODUCE A SUBSTANTIALLY PERFECT HOMOGENEITY, DRYING THE MIX, CALCINING THE MIX AT AN ELEVATED TEMPERATURE OF THE ORDER OF 1400* C., PULVERIZING THE CALCINED PRODUCT, ADDING SUFFICIENT ADDITIONAL ZIRCONIUM OXIDE SO THAT THE FINAL MIXTURE CONTAINS BETWEEN 5 TO 15 PER CENT ZIRCONIUM OXIDE, PLASTICIZING THE RESULTING COMPOSITION AND ADDING AN AMOUNT OF CLAY UP TO 2 PER CENT TO LOWER THE MATURING TEMPERATURE OF THE COMPOSITION, AND PRESSING AND FIRING THE COMPOSITION IN AN OXIDIZING ATMOSPHERE.
Claim 4
Dependent Claim
158 words
THE PROCESS OF PRODUCING A LOW DIELECTRIC CERAMIC FOR A CAPACITOR CONSISTING ESSENTIALLY OF, BY WEIGHT, 5 TO 15 PER CENT ZIRCONIUM OXIDE, 56.5 TO 91 PER CENT MAGNESIUM TITANATE AND 2 TO 36.5 PER CENT CALCIUM TITANATE, THE SAID PROCESS COMPRISING MIXING 99 PER CENT PURE CALCIUM CARBONATE, MAGNESIUM CARBONATE, TITANIUM OXIDE, PURE ZIRCONIUM OXIDE AND CLAY FROM WHICH IMPURITIES HAVE BEEN REMOVED, THE SAID COMPONENTS HAVING A PARTICLE SIZE FINER THAN 320 MESH; WET BALL MILLING THE MIX TO PRODUCE A SUBSTANTIALLY PERFECT HOMOGENEITY, DRYING THE MIX, CALCINING THE MIX AT AN ELEVATED TEMPERATURE OF THE ORDER OF 1400* C., PULVERIZING THE CALCINED PRODUCT, ADDING SUFFICIENT ADDITIONAL ZIRCONIUM OXIDE SO THAT THE FINAL MIXTURE CONTAINS BETWEEN 5 TO 15 PER CENT ZIRCONIUM OXIDE, PLASTICIZING THE RESULTING COMPOSITION AND ADDING AN AMOUNT OF CLAY UP TO 2 PER CENT TO LOWER THE MATURING TEMPERATURE OF THE COMPOSITION, AND PRESSING AND FIRING THE COMPOSITION IN AN OXIDIZING ATMOSPHERE.
References Cited (Backward Citations)
US2580708A
Cited
US2696651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |