Patent US2681599A successfully refreshed from Google Patents.
US2681599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding pulp and impregnating the product
Assignee: Wyeth Holdings LLC
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Filing: 1948-01-27
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Granted: 1954-06-22
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Expires: 1968-01-27
Abstract
No abstract record available.
Inventors
- 👤 Richard A M Palese
- 👤 Serenus H A Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:34
CPC Classifications
D; D21; D21J; D21J3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A METHOD OF PULP MOLDING WHICH COMPRISES PREPARING A SLURRY OF CELLULOSIC FIBRES, ADDING FROM 1% TO 4% BY WEIGHT BASED ON THE DRY WEIGHT OF THE CELLULOSIC FIBRES OF AN ACID COLLOID MELAMINE-FORMALDEHYDE RESIN TO SAID FIBER SLURRY, COLLECTING AND FORMING SAID FIBERS AND RESINS INTO A PREFORM, DRYING SAID PREFORM, IMPREGNATING SAID PREFORM WITH A SOLUTION OF A COPOLYMERIZABLE MIXTURE OF AN UNSATURATED POLYESTER RESIN AND A COPOLYMERIZABLE MONOMERIC SOLVENT THEREFOR SELECTED FROM THE GROUP CONSISTING OF STYRENE AND DIALLYL PHTHALATE, COATING THE SURFACE OF SAID IMPREGNATED PREFORM WITH A VOLATILE DISPERSION OF A GELLED POLYESTER RESIN AND REMOVING THE VOLATILE THEREFROM, AND CURING SAID RESIN IMPREGNATED AND COATED PREFORM BY THE APPLICATION OF HEAT.
Claim 2
Independent Claim
117 words
A METHOD OF PULP MOLDING WHICH COMPRISES PREPARING A SLURRY OF CELLULOSIC FIBRES, ADDING FROM 1% TO 4% BY WEIGHT BASED ON THE DRY WEIGHT OF THE CELLULOSIC FIBRES OF AN ACID COLLOID MELAMINE-FORMALDEHYDE RESIN TO SAID FIBER SLURRY, COLLECTING AND FORMING SAID FIBERS AND RESINS INTO A PREFORM, DRYING SAID PREFORM, IMPREGNATING SAID PREFORM WITH A SOLUTION OF A COPOLYMERIZABLE MIXTURE OF AN UNSATURATED POLYESTER RESIN AND A COPOLYMERIZABLE MONOMERIC SOLVENT THEREFOR SELECTED FROM THE GROUP CONSISTING OF STYRENE AND DIALLYL PHTHALATE, COATING THE SURFACE OF SAID IMPREGNATED PREFORM WITH A VOLATILE DISPERSION OF A GELLED POLYESTER RESIN AND REMOVING THE VOLATILE THEREFROM, AND CURING SAID RESIN IMPREGNATED AND COATED PREFORM BY THE APPLICATION OF HEAT.
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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) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |