US2715692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion producing apparatus
Assignee: Individual
•
Filing: 1946-09-20
•
Granted: 1955-08-16
•
Expires: 1966-09-20
Abstract
No abstract record available.
Inventors
- 👤 Alvin B Cardwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:02
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/26; H01J49/28; H01J49/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
APPARATUS FOR DEVELOPING GASEOUS IONS OF A SOURCE MATERIAL COMPRISING AN IONIZATION CHAMBER, MEANS FOR TRAVERSING SAID CHAMBER WITH AN IONIZING ELECTRON STREAM, MEANS FOR INTRODUCING VAPOR OF THE SOURCE MATERIAL INTO SAID CHAMBER AT ONE POSITION TO BE IONIZED BY SAID ELECTRON
Claim 2
Dependent Claim
43 words
APPARATUS FOR DEVELOPING GASEOUS IONS OF A SOURCE MATERIAL COMPRISING AN IONIZATION CHAMBER, MEANS FOR TRAVERSING SAID CHAMBER WITH AN IONIZING ELECTRON STREAM, MEANS FOR INTRODUCING VAPOR OF THE SOURCE MATERIAL INTO SAID CHAMBER AT ONE POSITION TO BE IONIZED BY SAID ELECTRON
References Cited (Backward Citations)
US2221467A
Cited
US2450462A
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 |