Patent US2715693A successfully refreshed from Google Patents.
US2715693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep collimating slot
Assignee: Individual
•
Filing: 1947-05-05
•
Granted: 1955-08-16
•
Expires: 1967-05-05
Abstract
No abstract record available.
Inventors
- 👤 Stephen M Macneille
- 👤 Kenneth R Mackenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:36
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/10; H01J49/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
AN ION PRODUCING MECHANISM OF THE CHARACTER DESCRIBED COMPRISING AN IONIZING CHAMBER ADAPTED TO RECEIVE GASEOUS VAPORS, A CATHODE FOR FEEDING ELECTRONS INTO SAID CHAMBER TO IONIZE THE VAPORS, A DEEP SLOTTED THICKENED BARRIER INTERPOSED BETWEEN SAID CATHODE AND SAID IONIZING CHAMBER TO PERMIT THE FLOW OF ELECTRONS WHILE LOWERING THE CRITICAL ALLOYING VOLTAGE OF THE CATHODE AND REDUCING ION BOMBARDMENT, SAID BARRIER HAVING A THICKNESS AT LEAST FIVE TIMES THE WIDTH OF SAID SLOT, AND OPENING FOR SAID IONIZING CHAMBER, AND ELECTRODES POSITIONED ON POTENTIAL FOR THE EJECTION OF IONS FROM SAID IONIZING CHAMBER.
References Cited (Backward Citations)
US2221467A
Cited
US2370673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-15 | 1959-02-14 | 1959-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-15 | 1963-02-14 | 1963-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-15 | 1967-02-14 | 1967-08-16 | $7700.00 | Window Closed / Lapsed |