US2984578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of making a lignocellulose product and products resulting therefrom
Assignee: Durel Inc
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Filing: 1958-09-30
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Granted: 1961-05-16
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Expires: 1978-09-30
Abstract
No abstract record available.
Inventors
- 👤 William T Glab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:17
CPC Classifications
C; C08; C08H; C08H8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE METHOD OF MAKING A LIGNOCELLULOSE PRODUCT, CONSISTING ESSENTIALLY OF: INTIMATELY MIXING PARTICLES OF LIGNOCELLULOSE WITH ABOUT 0.5-15% OF FORMALDEHYDE BY WEIGHT OF THE LIGNOCELLULOSE, AND HEATING THE RESULTING COMPOSITION UNDER CONFINED PRESSURE FOR BETWEEN ABOUT 4-60 MINUTES AND AT BETWEEN ABOUT 300-550*F. TO COMBINE CHEMICALLY SAID FORMALDEHYDE WITH THE LIGNOCELLULOSE.
Claim 2
Independent Claim
51 words
THE METHOD OF MAKING A LIGNOCELLULOSE PRODUCT, CONSISTING ESSENTIALLY OF: INTIMATELY MIXING PARTICLES OF LIGNOCELLULOSE WITH ABOUT 0.5-15% OF FORMALDEHYDE BY WEIGHT OF THE LIGNOCELLULOSE, AND HEATING THE RESULTING COMPOSITION UNDER CONFINED PRESSURE FOR BETWEEN ABOUT 4-60 MINUTES AND AT BETWEEN ABOUT 300-550*F. TO COMBINE CHEMICALLY SAID FORMALDEHYDE WITH THE LIGNOCELLULOSE.
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) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |