US3045320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnated cathodes
Assignee: Raytheon Co
•
Filing: 1959-03-12
•
Granted: 1962-07-24
•
Expires: 1979-03-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Apelbaum
- 👤 William J O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:53
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A METHOD OF MANUFACTURE WHICH COMPRISES FORMING A POROUS MEMBER OF TUNGSTEN OF SUFFICIENT MECHANICAL STRENGTH, APPLYING THORIUM TO THE SURFACE OF SAID MEMBER, IMPREGNATING SAID POROUS MEMBER WITH THORIUM, AND MACHINING SAID IMPREGNATED MEMBER TO THE DESIRED SIZE AND SHAPE.
Claim 2
Independent Claim
41 words
A METHOD OF MANUFACTURE WHICH COMPRISES FORMING A POROUS MEMBER OF TUNGSTEN OF SUFFICIENT MECHANICAL STRENGTH, APPLYING THORIUM TO THE SURFACE OF SAID MEMBER, IMPREGNATING SAID POROUS MEMBER WITH THORIUM, AND MACHINING SAID IMPREGNATED MEMBER TO THE DESIRED SIZE AND SHAPE.
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) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |