US2548646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moldproofing mineral coated papers
Assignee: Warren SD Co
•
Filing: 1946-01-02
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Granted: 1951-04-10
•
Expires: 1966-01-02
Abstract
No abstract record available.
Inventors
- 👤 John A Bieknell
- 👤 Stanley J Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:03
CPC Classifications
B; B27; B27K; B27K3/00; B27K3/52; Y; Y10; Y10S; Y10S260/00; Y10S260/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
PROCESS WHICH COMPRISES MIXING WITH CASEIN IN AQUEOUS MEDIUM SODIUM SALT OF PENTACHLOROPHENOL AND SODIUM PYROPHOSPHATE, IN AMOUNTS INDIVIDUALLY INSUFFICIENT TO SOLUBILIZE THE CASEIN BUT SUFFICIENT IN TOTO TO FORM A UNIFORM STABLE DISPERSION OF CASEIN IN WATER, TH SODIUM PYROPHOSPHATE CONTENT BEING ABOUT 5% BY WEIGHT OF THE CASEIN CONTENT, AND THEREAFTER DISPERSING ALUMINUM FLAKE THEREIN TO YIELD A PAPER COATING COMPOSITION.
Claim 2
Dependent Claim
63 words
PROCESS WHICH COMPRISES MIXING WITH CASEIN IN AQUEOUS MEDIUM SODIUM SALT OF PENTACHLOROPHENOL AND SODIUM PYROPHOSPHATE, IN AMOUNTS INDIVIDUALLY INSUFFICIENT TO SOLUBILIZE THE CASEIN BUT SUFFICIENT IN TOTO TO FORM A UNIFORM STABLE DISPERSION OF CASEIN IN WATER, TH SODIUM PYROPHOSPHATE CONTENT BEING ABOUT 5% BY WEIGHT OF THE CASEIN CONTENT, AND THEREAFTER DISPERSING ALUMINUM FLAKE THEREIN TO YIELD A PAPER COATING COMPOSITION.
References Cited (Backward Citations)
GB202883A
Cited
US1690390A
Cited
AU2024934A
Cited
US2297276A
Cited
US2362884A
Cited
GB543302A
Cited
US2288810A
Cited
US2430017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |