US2777773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barium titanate of increased dielectric constant and piezoelectric response and method of producing same
Assignee: Individual
•
Filing: 1953-07-01
•
Granted: 1957-01-15
•
Expires: 1973-07-01
Abstract
No abstract record available.
Inventors
- 👤 Robert M Callahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:38
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; H; H01; H01B; H01B3/00; H01B3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A METHOD OF PRODUCING BARIUM TITANATE WHICH COMPRISES CALCINING A POWDER MIXTURE OF BARIUM CARBONATE AND TITANIUM DIOXIDE CONTAINING THE FORMER IN SLIGHT MOLAR EXCESS OVER THE LATTER AND BETWEEN ABOUT .01 AND .04% BY WEIGHT OF ADDED ANTIMONY TRIOXIDE AT A TEMPERATURE BETWEEN ABOUT 1125 AND 1175* FOR A PERIOD OF TIME BETWEEN ABOUT 2 AND 4 HOURS.
Claim 2
Independent Claim
59 words
A METHOD OF PRODUCING BARIUM TITANATE WHICH COMPRISES CALCINING A POWDER MIXTURE OF BARIUM CARBONATE AND TITANIUM DIOXIDE CONTAINING THE FORMER IN SLIGHT MOLAR EXCESS OVER THE LATTER AND BETWEEN ABOUT .01 AND .04% BY WEIGHT OF ADDED ANTIMONY TRIOXIDE AT A TEMPERATURE BETWEEN ABOUT 1125 AND 1175* FOR A PERIOD OF TIME BETWEEN ABOUT 2 AND 4 HOURS.
References Cited (Backward Citations)
US2529719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |