Patent US4464224B1 successfully refreshed from Google Patents.
US4464224B1
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US4464224B1 - - Google Patents
Assignee: TABERT Inc
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Filing: 1982-06-30
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Granted: 1988-05-31
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Expires: 2002-06-30
Abstract
Abstract A process and apparatus for the manufacture of high bulk paper, or a high bulk layer of a multi-layered paper, which uses a mixture of fibres in a paper-making bond forming state and substantially dry fibres. The dry fibres may be mixed with the conventional slurry of bond forming fibres shortly before the headbox. The web may be dried primarily by pressing, with the dry fibres remaining incompletely wetted throughout the process and ensuring a bulky product; through-air driers need not be used. The invention also covers the novel product of this process.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:50
CPC Classifications
D; D21; D21F; D21F11/00; D21F11/14; D21F11/02; D21F11/04; D21F9/00; D21F9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |