US2974203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic electromechanical transducers
Assignee: AT&T Inc
•
Filing: 1958-04-29
•
Granted: 1961-03-07
•
Expires: 1978-04-29
Abstract
No abstract record available.
Inventors
- 👤 Steward S Flaschen
- 👤 Harold A Sauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:20
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/08; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A STOICHIOMETRIC SEMICONDUCTING CERAMIC COMPOSITION EXHIBITING A POSITION PIEZORESISTIVE EFFECT HAVING THE FOLLOWING COMPOSITION EXPRESSED ILN MOL FRACTIONS:
Claim 2
Dependent Claim
18 words
A STOICHIOMETRIC SEMICONDUCTING CERAMIC COMPOSITION EXHIBITING A POSITION PIEZORESISTIVE EFFECT HAVING THE FOLLOWING COMPOSITION EXPRESSED ILN MOL FRACTIONS:
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) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |