US3243626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive cathode with closely adjacent light-diffusing layer
Assignee: RCA Corp
•
Filing: 1962-07-17
•
Granted: 1966-03-29
•
Expires: 1982-07-17
Abstract
No abstract record available.
Inventors
- 👤 Helvy Fred Anderson
- 👤 Matheson Robert Macpherson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:26
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PHOTOMULTIPLIER TUBE COMPRISING AN EVACUATED ENVELOPE, A PHOTOEMISSIVE CATHODE IN SAID ENVELOPE, AN ELECTRON MULTIPLIER MEANS IN SAID ENVELOPE AND POSITIONED TO RECEIVE ELECTRONS DIRECTLY FROM SAID PHOTOEMISSIVE CATHODE, AND A SUPPORT HAVING A LIGHT DIFFUSING TRANSLUCENT REGION POSITIONED CLOSELY ADJACENT TO SAID PHOTOEMISSIVE CATHODE.
Claim 2
Dependent Claim
46 words
A PHOTOMULTIPLIER TUBE COMPRISING AN EVACUATED ENVELOPE, A PHOTOEMISSIVE CATHODE IN SAID ENVELOPE, AN ELECTRON MULTIPLIER MEANS IN SAID ENVELOPE AND POSITIONED TO RECEIVE ELECTRONS DIRECTLY FROM SAID PHOTOEMISSIVE CATHODE, AND A SUPPORT HAVING A LIGHT DIFFUSING TRANSLUCENT REGION POSITIONED CLOSELY ADJACENT TO SAID PHOTOEMISSIVE CATHODE.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |