US3013977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferroelectric materials
Assignee: Individual
•
Filing: 1958-08-07
•
Granted: 1961-12-19
•
Expires: 1978-08-07
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Berman
- 👤 James F Tribby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:22
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/80; H10N30/85; H10N30/853; G; G11; G11C; G11C11/00; G11C11/21; G11C11/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A MATERIAL WHOSE COMPOSITION, BY WEIGHT, IS FROM 97 TO 99 PERCENT BARIUM-STRONTIUM TITANATE FERROELECTRIC MATERIAL TOGETHER WITH ONE TO THREE PERCENT OF AN ADDITIVE SUBSTANCE CONSISTING ESSENTIALLY OF TITANIUM AND COBALTIC OXIDES IN EQUIMOLAR PARTS.
Claim 2
Dependent Claim
36 words
A MATERIAL WHOSE COMPOSITION, BY WEIGHT, IS FROM 97 TO 99 PERCENT BARIUM-STRONTIUM TITANATE FERROELECTRIC MATERIAL TOGETHER WITH ONE TO THREE PERCENT OF AN ADDITIVE SUBSTANCE CONSISTING ESSENTIALLY OF TITANIUM AND COBALTIC OXIDES IN EQUIMOLAR PARTS.
References Cited (Backward Citations)
US2738284A
Cited
US2576379A
Cited
CH304854A
Cited
US2742370A
Cited
US2729757A
Cited
US2789061A
Cited
US2721182A
Cited
US2731419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-18 | 1965-06-19 | 1965-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-18 | 1969-06-19 | 1969-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-18 | 1973-06-19 | 1973-12-19 | $7700.00 | Window Closed / Lapsed |