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US2659957A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1949-09-12
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Granted: 1953-11-24
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Expires: 1969-09-12
Abstract
No abstract record available.
Inventors
- 👤 Julius E Lilienfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:45
CPC Classifications
D; D03; D03D; D03D15/00; D03D15/50; D03D15/56; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5196; Y10T442/00; Y10T442/30; Y10T442/3008; Y10T442/3024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1885749A
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US2029880A
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US2072542A
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US2159615A
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US2188640A
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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) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |