US3133031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for bonding cellulosic particles
Assignee: Hexion Inc
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Filing: 1961-03-22
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Granted: 1964-05-12
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Expires: 1981-03-22
Abstract
No abstract record available.
Inventors
- 👤 John W Maxwell
- 👤 Clifford C Booth
- 👤 Thomas F Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:56
CPC Classifications
D; D21; D21J; D21J1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE PROCESS OF BONDING WATER PENETRABLE CELLULOSIC PARTICLES WHICH COMPRISES SPRAYING UPON THE PARTICLES IN UNMOISTENED CONDITION AN AQUOUES SOLUTION OF AN ACIDIC CURING AGNET FOR UREA FORMALDEHYDE RESINS, THEN SPRAYING THE SAID PARTICLES WITH AN AQUEOUS SOLUTION OF THE UREA FORMALDEHYDE RESIN, FORMING THE RESULTING MASS INTO SHAPE DESIRED, AND THEN PRESSING AND HEATING THE MASS TO THE TEMPERATURE OF CURING OF THE RESIN IN CONTACT WITH THE ACIDIC CURING AGENT, AMOUNTS USED ON THE DRY BASIS FOR 100 PARTS BY WEIGHT OF THE PARTICLES BEING ABOUT 0.1-1 PART OF THE CURING AGENT AND 3-15 PARTS OF THE RESIN.
Claim 2
Dependent Claim
100 words
THE PROCESS OF BONDING WATER PENETRABLE CELLULOSIC PARTICLES WHICH COMPRISES SPRAYING UPON THE PARTICLES IN UNMOISTENED CONDITION AN AQUOUES SOLUTION OF AN ACIDIC CURING AGNET FOR UREA FORMALDEHYDE RESINS, THEN SPRAYING THE SAID PARTICLES WITH AN AQUEOUS SOLUTION OF THE UREA FORMALDEHYDE RESIN, FORMING THE RESULTING MASS INTO SHAPE DESIRED, AND THEN PRESSING AND HEATING THE MASS TO THE TEMPERATURE OF CURING OF THE RESIN IN CONTACT WITH THE ACIDIC CURING AGENT, AMOUNTS USED ON THE DRY BASIS FOR 100 PARTS BY WEIGHT OF THE PARTICLES BEING ABOUT 0.1-1 PART OF THE CURING AGENT AND 3-15 PARTS OF THE RESIN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |