US2938464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air charger
Assignee: Nielsen Mfg Co
•
Filing: 1957-07-02
•
Granted: 1960-05-31
•
Expires: 1977-07-02
Abstract
No abstract record available.
Inventors
- 👤 Nielsen Adolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:29
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/44; F04F5/46; F04F5/461; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/313; Y10T137/3133
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1005288A
Cited
US1267897A
Cited
US2025577A
Cited
US2293632A
Cited
US2283907A
Cited
US2332694A
Cited
US2622531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |