Patent US2937158A successfully refreshed from Google Patents.
US2937158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for forming resins from phenols and hydropyrolysis products of lignocellulose
Assignee: FRANCIS H SNYDER AND ASSOCIATE
•
Filing: 1956-06-28
•
Granted: 1960-05-17
•
Expires: 1976-06-28
Abstract
No abstract record available.
Inventors
- 👤 Francis H Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:30
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS OF PREPARING A SYNTHETIC RESINOUS MATERIAL WHICH COMPRISES MIXING THE NON-AQUEOUS, RESINOUS PORTION OF THE HYDROLYSIS PRODUCT OBTAINED BY THE HYDROPYROLYSIS OF ACID-IMPREGNATED LIGNO-CELLULOSE MATERIAL AT PRESSURES BETWEEN 500 AND 1360 P.S.I. AND THE CORRESPONDING SATURATED STEAM TEMPERATURES FOR PERIODS OF 800 TO 10 SECONDS WITH DILUTE CAUSTIC AND A PHENOL OF THE CLASS CONSISTING OF HYDROXYBENZENE, RESORCINOL, AND CRESOLS, XYLENOLS, CRUDE MIXTURES THEREOF AND THE MONOAND DI-HYDROXY BIPHENYLS AND HEATING THE MIXTURE TO BRING ABOUT THR RESIN-PRODUCING REACTION.
Claim 2
Dependent Claim
81 words
A PROCESS OF PREPARING A SYNTHETIC RESINOUS MATERIAL WHICH COMPRISES MIXING THE NON-AQUEOUS, RESINOUS PORTION OF THE HYDROLYSIS PRODUCT OBTAINED BY THE HYDROPYROLYSIS OF ACID-IMPREGNATED LIGNO-CELLULOSE MATERIAL AT PRESSURES BETWEEN 500 AND 1360 P.S.I. AND THE CORRESPONDING SATURATED STEAM TEMPERATURES FOR PERIODS OF 800 TO 10 SECONDS WITH DILUTE CAUSTIC AND A PHENOL OF THE CLASS CONSISTING OF HYDROXYBENZENE, RESORCINOL, AND CRESOLS, XYLENOLS, CRUDE MIXTURES THEREOF AND THE MONOAND DI-HYDROXY BIPHENYLS AND HEATING THE MIXTURE TO BRING ABOUT THR RESIN-PRODUCING REACTION.
References Cited (Backward Citations)
US2197724A
Cited
GB583021A
Cited
US2319951A
Cited
US2397323A
Cited
US2560299A
Cited
US2776948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |