US3336475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for forming negative ions from iodine gas and a lanthanum boride contact ionizer surface
Assignee: Electro Optical Systems Inc
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Filing: 1964-02-05
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Granted: 1967-08-15
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Expires: 1984-02-05
Abstract
No abstract record available.
Inventors
- 👤 Wallace D Kilpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:40
CPC Classifications
H; H01; H01J; H01J27/00; H01J27/02; H01J27/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A HIGH YIELD SURFACE CONTACT IONIZATION NEGATIVE ION SOURCE COMPRISING: (A) A CONTACT IONIZER SURFACE OF LANTHANUM BORIDE; (B) MEANS FOR INTRODUCING IODINE GAS ONTO SAID CONTACT IONIZER SURFACE; (C) MEANS FOR HEATING SAID SURFACE TO EVAPORATE NEGATIVE IONS THEREFORE AND AT A RATE SUFFICIENT TO AVOID COLLECTION OF NEGATIVE IONS THEREON; AND,
Claim 2
Dependent Claim
53 words
A HIGH YIELD SURFACE CONTACT IONIZATION NEGATIVE ION SOURCE COMPRISING: (A) A CONTACT IONIZER SURFACE OF LANTHANUM BORIDE; (B) MEANS FOR INTRODUCING IODINE GAS ONTO SAID CONTACT IONIZER SURFACE; (C) MEANS FOR HEATING SAID SURFACE TO EVAPORATE NEGATIVE IONS THEREFORE AND AT A RATE SUFFICIENT TO AVOID COLLECTION OF NEGATIVE IONS THEREON; AND,
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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |