Patent JPS5877219A successfully refreshed from Google Patents.
Patent US3285801A successfully refreshed from Google Patents.
US3285801A
Expired / Lapsed
US
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Lignin containing resin binder
Assignee: West Virginia Pulp and Paper Co
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Filing: 1961-11-21
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Granted: 1966-11-15
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Expires: 1981-11-21
Abstract
No abstract record available.
Inventors
- 👤 Peter T Sarjeant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:21
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/34; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C03C25/32; C03C25/34; C04; C04B; C04B26/00; C04B26/02; C04B26/10; C04B26/12; D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/587; D04H1/64; Y; Y10; Y10T; Y10T428/00; Y10T428/249921
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
A MAT OF MINERAL FIBERS COMPRISING A PLURALITY OF MINERAL FIBERS BOUND TOGETHER AT THEIR POINTS OF CONTACT WITH A HEAT CURED THERMOSET RESIN WHICH CONSISTS ESSENTIALLY OF THE PRODUCT OF THE REACTION OF BETWEEN 20 AND 50 PARTS OF AN ALKALINE CATALYZED PHENOL FORMALDEHYDE RESIN, 28 TO 50 PARTS ALKALI LIGNIN AND SUFFICIENT UREA EQUAL TO BETWEEN 25 AND 80% OF THE LIGNIN TO MAKE 100 PARTS.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |