Patent US2431113A successfully refreshed from Google Patents.
US2431113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion filter
Assignee: Rauland Borg Corp
•
Filing: 1946-07-23
•
Granted: 1947-11-18
•
Expires: 1966-07-23
Abstract
No abstract record available.
Inventors
- 👤 Glyptis Nicholas
- 👤 George K Schnable
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:21
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/02; H01J5/18; H01J29/00; H01J29/84; Y; Y10; Y10T; Y10T29/00; Y10T29/30; Y10T29/301; Y10T29/308
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2004177A
Cited
US2030492A
Cited
US2181850A
Cited
US2200846A
Cited
GB519015A
Cited
US2187126A
Cited
US2285424A
Cited
US2274586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |