US2983630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treating a cellulose-containing base to impart thereto alkali resistance, composition therefor and the resultant product
Assignee: De Soto Chemical Coatings Inc
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Filing: 1958-08-25
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Granted: 1961-05-09
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Expires: 1978-08-25
Abstract
No abstract record available.
Inventors
- 👤 Bryce P Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:00
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/48; D21H17/49; D21H17/51; Y; Y10; Y10T; Y10T428/00; Y10T428/4935; Y10T428/662
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A METHOD OF INHIBITING THE DETERIORATION OF A CELLULOSE-CONTAINING BASE NORMALLY DETERIORATING IN THE PRESENCE OF ACID AND ALKALI, COMPRISING TREATING THE SAID CELLULOSE-CONTAINING BASE WITH A LIQUID IMPREGNATING COMPOSITION FORMED FROM A MIXTURE OF (A) A THERMOSETTING RESIN SELECTED FROM THE GROUP CONSISTING OF PHENOL-ALDEHYDE AND AMINE-ALDEHYDE RESINS, (B) AT LEAST ONE DICARBOXYLIC ACID, AND (C) A SALT OF A TRIVALENT METAL ION, THE DICARBOXYLIC ACID BEING PRESENT IN THE MIXTURE IN AN AMOUNT AT LEAST 25% BASED ON RESIN SOLIDS, AT LEAST ONETHIRD OF THE DICARBOXYLIC ACID BEING OXALIC ACID, THE SALT OF THE TRIVALENT METAL ION BEING PRESENT IN THE IMPREGNATING COMPOSITION TO YIELD BETWEEN ABOUT 0.5 AND ABOUT 2.0% OF TRIVALENT METAL ION BASED ON RESIN SOLIDS, AND DRYING AND BAKING THE SO-TREATED BASE AT A TEMPERATURE ABOVE ABOUT 125*F. AND BELOW THE TEMPERATURE AT WHICH THE ACID AND ALKALI RESISTANCE OF THE BAKED BASE IN IMPAIRED.
Claim 2
Independent Claim
151 words
A METHOD OF INHIBITING THE DETERIORATION OF A CELLULOSE-CONTAINING BASE NORMALLY DETERIORATING IN THE PRESENCE OF ACID AND ALKALI, COMPRISING TREATING THE SAID CELLULOSE-CONTAINING BASE WITH A LIQUID IMPREGNATING COMPOSITION FORMED FROM A MIXTURE OF (A) A THERMOSETTING RESIN SELECTED FROM THE GROUP CONSISTING OF PHENOL-ALDEHYDE AND AMINE-ALDEHYDE RESINS, (B) AT LEAST ONE DICARBOXYLIC ACID, AND (C) A SALT OF A TRIVALENT METAL ION, THE DICARBOXYLIC ACID BEING PRESENT IN THE MIXTURE IN AN AMOUNT AT LEAST 25% BASED ON RESIN SOLIDS, AT LEAST ONETHIRD OF THE DICARBOXYLIC ACID BEING OXALIC ACID, THE SALT OF THE TRIVALENT METAL ION BEING PRESENT IN THE IMPREGNATING COMPOSITION TO YIELD BETWEEN ABOUT 0.5 AND ABOUT 2.0% OF TRIVALENT METAL ION BASED ON RESIN SOLIDS, AND DRYING AND BAKING THE SO-TREATED BASE AT A TEMPERATURE ABOVE ABOUT 125*F. AND BELOW THE TEMPERATURE AT WHICH THE ACID AND ALKALI RESISTANCE OF THE BAKED BASE IN IMPAIRED.
References Cited (Backward Citations)
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US2225256A
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US2343089A
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US2629703A
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US2629648A
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US2656296A
Cited
US2749257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |