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Patent US2539978A successfully refreshed from Google Patents.
US2539978A
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Drying yarn
Assignee: Akzona Inc
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Filing: 1949-04-25
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Granted: 1951-01-30
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Expires: 1969-04-25
Abstract
No abstract record available.
Inventors
- 👤 Pieter Van Dijk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:01
CPC Classifications
D; D01; D01D; D01D10/00; D01D10/04; D01D10/0436; D01D10/0445; D01D11/00; D01D11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3881A
Cited
US2203686A
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US2147421A
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US2177541A
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US2162727A
Cited
US2398856A
Cited
US2440159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |