US2999108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bark treatment process and product
Assignee: Rayonier Inc
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Filing: 1957-10-07
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Granted: 1961-09-05
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Expires: 1977-10-07
Abstract
No abstract record available.
Inventors
- 👤 Gray Kenneth Russell
- 👤 Lloyd Eugene Van Blaricom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:20
CPC Classifications
C; C07; C07C; C07C309/00; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/035
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
THE PROCESS OF MAKING A BARK DERIVATIVE CONTAINING WATER-SOLUBLE SULFONATE SALTS OF HYDROXY AROMATIC POLYMERIC COMPOUNDS WHICH COMPRISES DIGESTING A BARK OF THE GROUP CONSISTING OF DOUGLAS FIR, AMABILIS FIR, AND SOUTHERN PINE IN AN ACID WATER SOLUTION AT A PH BELOW 7.0 OF A SALT OF THE GROUP CONSISTING OF SODIUM AND POTASSIUM SALT OF SULFUROUS ACID WHICH IS AT LEAST 50% ALKALI BISULFITE AT A TEMPERATURE OF FROM 105*C. TO 200*C. WHILE MAINTAINING SULFUROUS ACID SALT IN THE REACTION MIXTURE, SAID HEATING BEING CONTINUED UNTIL A PORTION OF THE SULFUROUS ACID RADICAL OF THE INORGANIC SALT IS COMBINED IN THE WATER-SOLUBLE DERIVATIVES OF THE BARK, SEPARATING FROM THE BARK RESIDUE THE WATER-SOLUBLE BARK DERIVATIVE WHICH IS PRACTICALLY FREE OF SAPONIFIED MATTER, AND ALKALIZING THE SOLUTION BY THE ADDITION OF A SODIUM COMPOUND.
Claim 2
Dependent Claim
134 words
THE PROCESS OF MAKING A BARK DERIVATIVE CONTAINING WATER-SOLUBLE SULFONATE SALTS OF HYDROXY AROMATIC POLYMERIC COMPOUNDS WHICH COMPRISES DIGESTING A BARK OF THE GROUP CONSISTING OF DOUGLAS FIR, AMABILIS FIR, AND SOUTHERN PINE IN AN ACID WATER SOLUTION AT A PH BELOW 7.0 OF A SALT OF THE GROUP CONSISTING OF SODIUM AND POTASSIUM SALT OF SULFUROUS ACID WHICH IS AT LEAST 50% ALKALI BISULFITE AT A TEMPERATURE OF FROM 105*C. TO 200*C. WHILE MAINTAINING SULFUROUS ACID SALT IN THE REACTION MIXTURE, SAID HEATING BEING CONTINUED UNTIL A PORTION OF THE SULFUROUS ACID RADICAL OF THE INORGANIC SALT IS COMBINED IN THE WATER-SOLUBLE DERIVATIVES OF THE BARK, SEPARATING FROM THE BARK RESIDUE THE WATER-SOLUBLE BARK DERIVATIVE WHICH IS PRACTICALLY FREE OF SAPONIFIED MATTER, AND ALKALIZING THE SOLUTION BY THE ADDITION OF A SODIUM COMPOUND.
Claim 3
Dependent Claim
115 words
A WATER-SOLUBLE PRODUCT COMPRISING ALKALI METAL SULFONIC ACID SALTS OF AROMATIC HYDROXY POLYMERIC COMPOUNDS AND INORGANIC ALKALI METAL SALTS RESULTING FROM DIGESTING A BARK OF THE GROUP CONSISTING OF DOUGLAS FIR, AMABILIS FIR, AND SOUTHERN PINE IN AN ACID WATER SOLUTION AT A PH BELOW 7.0 OF A SALT OF SULFUROUS ACID OF THE GROUP CONSISTING OF SODIUM BISULFITE, AND SODIUM SULFITE AT A TEMPERATURE OF FROM 105*C. TO 200*C. UNTIL A PORTION OF THE INSOLUBLE PART OF THE BARK IS CONVERTED TO WATER-SOLUBLE HYDROXY AROMATIC ALKALI SULFONATE COMPOUNDS, SEPARATING FROM THE BARK RESIDUE THE WATERSOLUBLE COMPOSITION WHICH IS PRACTICALLY FREE OF SAPONIFIED MATTER, AND ALKALIZING THE SOLUTION BY THE ADDITION OF A SODIUM COMPOUND.
Claim 4
Dependent Claim
115 words
A WATER-SOLUBLE PRODUCT COMPRISING ALKALI METAL SULFONIC ACID SALTS OF AROMATIC HYDROXY POLYMERIC COMPOUNDS AND INORGANIC ALKALI METAL SALTS RESULTING FROM DIGESTING A BARK OF THE GROUP CONSISTING OF DOUGLAS FIR, AMABILIS FIR, AND SOUTHERN PINE IN AN ACID WATER SOLUTION AT A PH BELOW 7.0 OF A SALT OF SULFUROUS ACID OF THE GROUP CONSISTING OF SODIUM BISULFITE, AND SODIUM SULFITE AT A TEMPERATURE OF FROM 105*C. TO 200*C. UNTIL A PORTION OF THE INSOLUBLE PART OF THE BARK IS CONVERTED TO WATER-SOLUBLE HYDROXY AROMATIC ALKALI SULFONATE COMPOUNDS, SEPARATING FROM THE BARK RESIDUE THE WATERSOLUBLE COMPOSITION WHICH IS PRACTICALLY FREE OF SAPONIFIED MATTER, AND ALKALIZING THE SOLUTION BY THE ADDITION OF A SODIUM COMPOUND.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |