Patent US2786008A successfully refreshed from Google Patents.
US2786008A
Expired / Lapsed
US
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Acidic ammonium-base sulfite waste liquor-phenol-aldehyde resins, their production and application
Assignee: Fort James Corp
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Filing: 1953-04-13
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Granted: 1957-03-19
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Expires: 1973-04-13
Abstract
No abstract record available.
Inventors
- 👤 Robert J Herschler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:07
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE METHOD OF MAKING RESIN-SURFACED FIBERBOARD WHICH COMPRISES FORMING A MIXTURE OF PIECES OF LIGNOCELLULOSE AND AN ADHESIVE MATERIAL, FORMING THE MIXTURE INTO A MAT, APPLYING TO THE SURFACE OF THE MAT AS RESINOUS COMPOSITION COMPRISING ESSENTIALLY ACIDISC AMMONIUMBASE SULFITE WASTE LIQUOR RESULTING FROM PULPING LIGNOCELLULOSE WITH AQUEOUS SOLUTION INCLUDING AMMONIUM BISULFITE AND AN AQUEOUS SOLUTION OF AN ACID-TOLERANT, THERMOSETTING PHENOL-ALDEHYDE RESIN, APPLYING PRESSURE TO THE RESULTING TREATED MAT AND MAINTAINING THE MAT UNDER PRESSURE UNTIL ITS ADHESIVE AND RESINOUS COMPONENTS HAVE SET, THEREBY FORMING AS A PRODUCT A RESIN-SURFACED FIBERBOARD.
Claim 2
Independent Claim
91 words
THE METHOD OF MAKING RESIN-SURFACED FIBERBOARD WHICH COMPRISES FORMING A MIXTURE OF PIECES OF LIGNOCELLULOSE AND AN ADHESIVE MATERIAL, FORMING THE MIXTURE INTO A MAT, APPLYING TO THE SURFACE OF THE MAT AS RESINOUS COMPOSITION COMPRISING ESSENTIALLY ACIDISC AMMONIUMBASE SULFITE WASTE LIQUOR RESULTING FROM PULPING LIGNOCELLULOSE WITH AQUEOUS SOLUTION INCLUDING AMMONIUM BISULFITE AND AN AQUEOUS SOLUTION OF AN ACID-TOLERANT, THERMOSETTING PHENOL-ALDEHYDE RESIN, APPLYING PRESSURE TO THE RESULTING TREATED MAT AND MAINTAINING THE MAT UNDER PRESSURE UNTIL ITS ADHESIVE AND RESINOUS COMPONENTS HAVE SET, THEREBY FORMING AS A PRODUCT A RESIN-SURFACED FIBERBOARD.
References Cited (Backward Citations)
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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) | 1960-03-18 | 1960-09-17 | 1961-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-18 | 1964-09-17 | 1965-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-18 | 1968-09-17 | 1969-03-19 | $7700.00 | Window Closed / Lapsed |