US2930939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Panel
Assignee: Individual
•
Filing: 1954-08-30
•
Granted: 1960-03-29
•
Expires: 1974-08-30
Abstract
No abstract record available.
Inventors
- 👤 Nels E Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:33
CPC Classifications
H; H02; H02B; H02B1/00; H02B1/015; H02B1/04; H02B1/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1659309A
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US2010338A
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US1963722A
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US1968039A
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US2315420A
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US2325095A
Cited
US2374800A
Cited
US2394062A
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US2508030A
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US2592552A
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US2787773A
Cited
US2722888A
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US2804607A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |