Patent US2531825A successfully refreshed from Google Patents.
US2531825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paint, varnish, and lacquer remover
Assignee: NL Industries Inc
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Filing: 1947-03-29
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Granted: 1950-11-28
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Expires: 1967-03-29
Abstract
No abstract record available.
Inventors
- 👤 Edwin P Peterson
- 👤 Oscar P Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:25
CPC Classifications
C; C09; C09D; C09D9/00; C09D9/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A SOFTENER OR REMOVER FOR COATINGS, CONSISTING ESSENTAILLY OF AN ORGANIC LIQUID OF A GENERALLY COATING PENETRATING AND LOOSENING CHARACTER, HAVING COLLOIDALLY DISPERSED THEREIN IN AN AMOUNT SUFFICIENT TO SUBSTANTIALLY INCREASE THE VISCOSITY THEREOF, A CATION-MODIFIED CLAY, ORIGINALLY EXHIBITING A BASE-EXCHANGE CAPACITY OF AT LEAST 25 AND IN WHICH THE INORGANIC CATION HAS BEEN EXCHANGED FOR AN ONIUM BASE OF A TYPE CAPABLE OF AND TO AN EXTENT SUFFICIENT TO FORM WITH THE CLAY ANION AN ONIUM-CLAY, 2 GRAMS OF WHICH ONIUM CLAY SWELLING TO AT LEAST 16 MILLILITERS IN NITROBENZENE.
Claim 2
Dependent Claim
91 words
A SOFTENER OR REMOVER FOR COATINGS, CONSISTING ESSENTAILLY OF AN ORGANIC LIQUID OF A GENERALLY COATING PENETRATING AND LOOSENING CHARACTER, HAVING COLLOIDALLY DISPERSED THEREIN IN AN AMOUNT SUFFICIENT TO SUBSTANTIALLY INCREASE THE VISCOSITY THEREOF, A CATION-MODIFIED CLAY, ORIGINALLY EXHIBITING A BASE-EXCHANGE CAPACITY OF AT LEAST 25 AND IN WHICH THE INORGANIC CATION HAS BEEN EXCHANGED FOR AN ONIUM BASE OF A TYPE CAPABLE OF AND TO AN EXTENT SUFFICIENT TO FORM WITH THE CLAY ANION AN ONIUM-CLAY, 2 GRAMS OF WHICH ONIUM CLAY SWELLING TO AT LEAST 16 MILLILITERS IN NITROBENZENE.
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) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |