US2782241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bark treatment process and product
Assignee: Rayonier Inc
•
Filing: 1955-03-02
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Granted: 1957-02-19
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Expires: 1975-03-02
Abstract
No abstract record available.
Inventors
- 👤 Gray Kenneth Russell
- 👤 Crosby Hartzell Llance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:43
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/60; C07D311/62; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A WATER-SOLUBLE AROMATIC PRODUCT COMPRISING AT LEAST 6% PHENOLIC HYDROXYL PRODUCED BY DIGESTING A BARK OF THE GROUP CONSISTING OF WESTERN HEMLOCK, DOUGLAS FIR, WHITE FIR, SITKA SPRUCE AND SOUTHERN YELLOW PINE IN AN AQUEOUS SOLUTION OF SODIUM HYDROXIDE HAVING A CONCENTRATION OF ABOUT 1% AND CONTAINING ABOUT 0.065 PART SODIUM HYDROXIDE PER PART OF BARK AT A TEMPERATURE OF FROM 65*C. TO 150*C. FOR FROM 0.5 TO 2 HOURS, SAID BARK PRODUCT HAVING COMBINED THEREWITH FROM 0.04 TO 0.13 PART OF SODIUM HYDROXIDE PER PART OF DRY BARK.
Claim 2
Dependent Claim
89 words
A WATER-SOLUBLE AROMATIC PRODUCT COMPRISING AT LEAST 6% PHENOLIC HYDROXYL PRODUCED BY DIGESTING A BARK OF THE GROUP CONSISTING OF WESTERN HEMLOCK, DOUGLAS FIR, WHITE FIR, SITKA SPRUCE AND SOUTHERN YELLOW PINE IN AN AQUEOUS SOLUTION OF SODIUM HYDROXIDE HAVING A CONCENTRATION OF ABOUT 1% AND CONTAINING ABOUT 0.065 PART SODIUM HYDROXIDE PER PART OF BARK AT A TEMPERATURE OF FROM 65*C. TO 150*C. FOR FROM 0.5 TO 2 HOURS, SAID BARK PRODUCT HAVING COMBINED THEREWITH FROM 0.04 TO 0.13 PART OF SODIUM HYDROXIDE PER PART OF DRY BARK.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |