US3374384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing negative helium ions
Assignee: Lake Forest College
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Filing: 1966-05-05
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Granted: 1968-03-19
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Expires: 1986-05-05
Abstract
No abstract record available.
Inventors
- 👤 Bailey L Donnally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:18
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR PRODUCING NEGATIVELY CHARGED HELIUM IONS COMPRISING THE STEPS OF: PASSING A BEAM OF RELATIVELY LOW ENERGY POSITIVELY CHARGED HELIUM IONS THROUGH THE VAPOR OF AN ALKALI ATOM IN ORDER TO PRODUCE METASTABLE HELIUM ATOMS; AND PASSING SAID METASTABLE HELIUM ATOMS THROUGH THE VAPOR OF AN ALKALI ATOM IN ORDER TO CONVERT SAID METASTABLE HELIUM ATOMS INTO NEGATIVELY CHARGED HELIUM IONS.
Claim 2
Dependent Claim
63 words
A PROCESS FOR PRODUCING NEGATIVELY CHARGED HELIUM IONS COMPRISING THE STEPS OF: PASSING A BEAM OF RELATIVELY LOW ENERGY POSITIVELY CHARGED HELIUM IONS THROUGH THE VAPOR OF AN ALKALI ATOM IN ORDER TO PRODUCE METASTABLE HELIUM ATOMS; AND PASSING SAID METASTABLE HELIUM ATOMS THROUGH THE VAPOR OF AN ALKALI ATOM IN ORDER TO CONVERT SAID METASTABLE HELIUM ATOMS INTO NEGATIVELY CHARGED HELIUM IONS.
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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |