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Patent US2428519A successfully refreshed from Google Patents.
US2428519A
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Assignee: Individual
•
Filing: 1944-09-01
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Granted: 1947-10-07
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Expires: 1964-09-01
Abstract
No abstract record available.
Inventors
- 👤 George H Gustafson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:23
CPC Classifications
G; G09; G09F; G09F3/00; G09F3/08; G09F3/18; G09F3/20; G09F3/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1136487A
Cited
US1475134A
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US1488282A
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US1651471A
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US2029091A
Cited
US2250263A
Cited
US2304795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |