Patent US2175688A successfully refreshed from Google Patents.
Patent US4131479A successfully refreshed from Google Patents.
US4131479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent ceramics
Assignee: Toshiba Corp
•
Filing: 1977-03-08
•
Granted: 1978-12-26
•
Expires: 1997-03-08
Abstract
Abstract A transparent, complex oxide ceramic having the formula:
Inventors
- 👤 Noboru Ichinose
- 👤 Hideo Ookuma
- 👤 Toshiaki Mizutani
- 👤 Hideaki Hiraki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:47
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/02; H01J5/04; C; C04; C04B; C04B35/00; C04B35/01; C04B35/495; C04B35/497; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W70/692; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
A transparent, single phase, complex oxide ceramic material of the formula (Sr 1-x Ca x )(Li 1/4 Nb 3/4 )O 3 wherein x is 0.01-0.50.
Claim 2
Dependent Claim
25 words
A transparent, single phase, complex oxide ceramic material of the formula (Sr 1-x Ca x )(Li 1/4 Nb 3/4 )O 3 wherein x is 0.01-0.50.
Claim 3
Dependent Claim
71 words
A process for preparing a transparent, single phase, complex oxide ceramic material of the formula (Sr 1-x Ca x )(Li 1/4 Nb 3/4 )O 3 wherein x is 0.01-0.50 comprising: blending the metal oxide components of transparent, complex oxide ceramic material with a binder; shaping and pressing said blended materials under 0.5-2 ton/cm 2 ; and sintering said shaped material under an atmosphere of oxygen at 1150°-1450° C. for 2-4 hours.
Claim 4
Dependent Claim
71 words
A process for preparing a transparent, single phase, complex oxide ceramic material of the formula (Sr 1-x Ca x )(Li 1/4 Nb 3/4 )O 3 wherein x is 0.01-0.50 comprising: blending the metal oxide components of transparent, complex oxide ceramic material with a binder; shaping and pressing said blended materials under 0.5-2 ton/cm 2 ; and sintering said shaped material under an atmosphere of oxygen at 1150°-1450° C. for 2-4 hours.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |