US2881512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for sintered barium cathodes
Assignee: Thales SA
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Filing: 1955-06-13
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Granted: 1959-04-14
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Expires: 1975-06-13
Abstract
No abstract record available.
Inventors
- 👤 Huber Harry
- 👤 Freytag Jean
- 👤 Reynaud Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:05
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
COMPOSITION FOR A TABLE USE AS EMISSIVE PORTION OF A SINTERED BARIUM CATHODE CONSISTING ESSENTIALLY OF PERCENT 3BAO+WO3 (BASIC BARIUM TUNGSTATE) 5 AL 15 W 80
Claim 2
Dependent Claim
26 words
COMPOSITION FOR A TABLE USE AS EMISSIVE PORTION OF A SINTERED BARIUM CATHODE CONSISTING ESSENTIALLY OF PERCENT 3BAO+WO3 (BASIC BARIUM TUNGSTATE) 5 AL 15 W 80
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) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |