Patent US2661669A successfully refreshed from Google Patents.
US2661669A
Expired / Lapsed
US
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Process and apparatus for avoiding curl in machine-made paper
Assignee: BECKETT PAPER Co
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Filing: 1951-02-14
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Granted: 1953-12-08
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Expires: 1971-02-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Valentine Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:22
CPC Classifications
D; D21; D21F; D21F5/00; D21F5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1595473A
Cited
FR663948A
Cited
US1962882A
Cited
US1900166A
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US2091805A
Cited
US2214641A
Cited
US2314797A
Cited
US3327163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |