US3138729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra-soft X-ray source
Assignee: Philips Electronics and Pharmaceutical Industries Corp
•
Filing: 1961-09-18
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Granted: 1964-06-23
•
Expires: 1981-09-18
Abstract
No abstract record available.
Inventors
- 👤 Burton L Henke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:14
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
AN ULTRA-SOFT X-RAY SOURCE COMPRISING AN EVACUATED ENVELOPE, A WINDOW IN SAID ENVELOPE FOR THE PASSAGE OF ULTRA-SOFT X-RAYS, AN ANODE, A CATHODE ON THE SIDE OF THE ANODE REMOTE FROM THE WINDOW, A BARRIER ELECTRODE POSITIONED BETWEEN THE CATHODE AND ANODE FOR FOCUSING AN ELECTRON BEAM ONTO THE SIDE OF THE ANODE FACING WINDOW, AND A SPACE-CHARGE ELIMINATION ELECTRODE POSITIONED BETWEEN THE CATHODE AND THE ANODE AND PARTIALLY SURROUNDING SAID BARRIER ELECTRODE.
Claim 2
Dependent Claim
73 words
AN ULTRA-SOFT X-RAY SOURCE COMPRISING AN EVACUATED ENVELOPE, A WINDOW IN SAID ENVELOPE FOR THE PASSAGE OF ULTRA-SOFT X-RAYS, AN ANODE, A CATHODE ON THE SIDE OF THE ANODE REMOTE FROM THE WINDOW, A BARRIER ELECTRODE POSITIONED BETWEEN THE CATHODE AND ANODE FOR FOCUSING AN ELECTRON BEAM ONTO THE SIDE OF THE ANODE FACING WINDOW, AND A SPACE-CHARGE ELIMINATION ELECTRODE POSITIONED BETWEEN THE CATHODE AND THE ANODE AND PARTIALLY SURROUNDING SAID BARRIER ELECTRODE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |