US2515232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-detecting paper and a water-detecting coating composition therefor
Assignee: Individual
•
Filing: 1946-12-31
•
Granted: 1950-07-18
•
Expires: 1966-12-31
Abstract
No abstract record available.
Inventors
- 👤 Morris S Kantrowitz
- 👤 Earl J Gosnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:43
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A COATING COMPOSITION ADAPTED TO DETECT THE PRESENCE OF WATER THEREON CONSISTING OF AN ORGANIC DYESTUFF WHICH IS RELATIVELY COLORLESS IN THIN LAYERS BUT WHICH DEVELOPS STRONG COLORATION IN CONTACT WITH MOISTURE, HAVING INCORPORATED THEREWITH A DRYING OIL, A CELLULOSE PLASTIC OF THE CLASS CONSISTING OF CELLULOSE LOWER ALKYL ETHERS AND CELLULOSE LOWER ALKANOATES, AND AN ORGANIC MUTUAL SOLVENT FOR SAID DRYING OIL AND SAID PLASTIC, SAID SOLVENT BEING INCAPABLE OF SUBSTANTIALLY DEVELOPING THE TINCTORIAL CHARACTERISTICS OF SAID DYESTUFF.
Claim 2
Dependent Claim
79 words
A COATING COMPOSITION ADAPTED TO DETECT THE PRESENCE OF WATER THEREON CONSISTING OF AN ORGANIC DYESTUFF WHICH IS RELATIVELY COLORLESS IN THIN LAYERS BUT WHICH DEVELOPS STRONG COLORATION IN CONTACT WITH MOISTURE, HAVING INCORPORATED THEREWITH A DRYING OIL, A CELLULOSE PLASTIC OF THE CLASS CONSISTING OF CELLULOSE LOWER ALKYL ETHERS AND CELLULOSE LOWER ALKANOATES, AND AN ORGANIC MUTUAL SOLVENT FOR SAID DRYING OIL AND SAID PLASTIC, SAID SOLVENT BEING INCAPABLE OF SUBSTANTIALLY DEVELOPING THE TINCTORIAL CHARACTERISTICS OF SAID DYESTUFF.
References Cited (Backward Citations)
US1573976A
Cited
US1785367A
Cited
US2036768A
Cited
US2118432A
Cited
US2152856A
Cited
US2214354A
Cited
US2249867A
Cited
US2254609A
Cited
US2261473A
Cited
US2229155A
Cited
US2426194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |