Patent US2668020A successfully refreshed from Google Patents.
US2668020A
Expired / Lapsed
US
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Yarn shipping core
Assignee: Sonoco Products Co
•
Filing: 1950-10-25
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Granted: 1954-02-02
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Expires: 1970-10-25
Abstract
No abstract record available.
Inventors
- 👤 Charles K Dunlap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:21
CPC Classifications
D; D01; D01H; D01H7/00; D01H7/02; D01H7/04; D01H7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US29451A
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US346135A
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US2038892A
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US2249387A
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US2236179A
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US2236178A
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US2359604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |