US2855317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramics
Assignee: Sprague Electric Co
•
Filing: 1954-10-15
•
Granted: 1958-10-07
•
Expires: 1974-10-15
Abstract
No abstract record available.
Inventors
- 👤 Malcolm C Mcquarrie
- 👤 Frank G Recny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:36
CPC Classifications
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
15 words
A COMPOSITION HAVING 0.1% BY WEIGHT OF COLUMBIUM OXIDE, THE BALANCE BEING ESSENTIALLY BARIUM TITANATE.
Claim 2
Dependent Claim
15 words
A COMPOSITION HAVING 0.1% BY WEIGHT OF COLUMBIUM OXIDE, THE BALANCE BEING ESSENTIALLY BARIUM TITANATE.
References Cited (Backward Citations)
US2646359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |