Patent US2731432A successfully refreshed from Google Patents.
US2731432A
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Coating compositions comprising particulate polyamides dispersed in aqueous solutions of alkali metal silicates
Assignee: Midland Chemical Corp
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Filing: 1953-03-11
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Granted: 1956-01-17
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Expires: 1973-03-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Toulmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:31
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C04; C04B; C04B24/00; C04B24/24; C04B24/28; C04B24/287; C08J2377/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A LIQUID COATING COMPOSITION COMPRISING A DISPERSION OF A PARTICULATE POLYAMIDE HAVING THE AMIDE GROUPS THEREOF AS INTEGRAL MEMBERS OF THE POLYMER CHAIN, A MOLECULAR WEIGHT OF AT LEAST 5,000 AND AN AVERAGE PARTICLE SIZE SUCH THAT AT LEAST 90% OF THE PARTICLES ARE CAPABLE OF PASSING THROUGH A 100 TO 400-MESH TYLER SIEVE. IN AN AQUEOUS SOLUTION OF FROM ABOUT 20% TO ABOUT 40% BY WEIGHT OF AN ALKALI METAL SILICATE HAVING AN XO2 TO SIO2 RATIO BETWEEN ABOUT 1:1.7 TO 1:3.9, X REPRESENTING THE ALKALI METAL, THE AMOUNT OF PARTICULATE POLYAMIDE IN THE COMPOSITION BEING BETWEEN ABOUT 5 LBS. AND 18 LBS. THEREOF PER GALLON OF THE AQUEOUS ALKALI METAL SILICATE SOLUTION.
Claim 2
Dependent Claim
114 words
A LIQUID COATING COMPOSITION COMPRISING A DISPERSION OF A PARTICULATE POLYAMIDE HAVING THE AMIDE GROUPS THEREOF AS INTEGRAL MEMBERS OF THE POLYMER CHAIN, A MOLECULAR WEIGHT OF AT LEAST 5,000 AND AN AVERAGE PARTICLE SIZE SUCH THAT AT LEAST 90% OF THE PARTICLES ARE CAPABLE OF PASSING THROUGH A 100 TO 400-MESH TYLER SIEVE. IN AN AQUEOUS SOLUTION OF FROM ABOUT 20% TO ABOUT 40% BY WEIGHT OF AN ALKALI METAL SILICATE HAVING AN XO2 TO SIO2 RATIO BETWEEN ABOUT 1:1.7 TO 1:3.9, X REPRESENTING THE ALKALI METAL, THE AMOUNT OF PARTICULATE POLYAMIDE IN THE COMPOSITION BEING BETWEEN ABOUT 5 LBS. AND 18 LBS. THEREOF PER GALLON OF THE AQUEOUS ALKALI METAL SILICATE SOLUTION.
References Cited (Backward Citations)
US2467192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |