US2804436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starch-clay coating colors
Assignee: Wyeth Holdings LLC
•
Filing: 1955-01-31
•
Granted: 1957-08-27
•
Expires: 1975-01-31
Abstract
No abstract record available.
Inventors
- 👤 Daniel D Ritson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:08
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/54; D06; D06P; D06P1/00; D06P1/44; D21H19/38; D21H19/40; D21H19/56; D21H19/58; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31975
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
REPLACEMENT OF HALF OF THE STARCH OF THE COATING FORMULATION BY PURE POLYACRYLAMIDE OR A HIGH ARYLAMIDELOW ACRYLIC ACID COPOLYMER (COLORS A-D) GAVE COATING COLORS WHICH HAD UNDESIRABLY HIGH VISCOSITIES AND WHICH YIELDED POOR WET-RUB RESISTANCE VALUES.
Claim 2
Dependent Claim
37 words
REPLACEMENT OF HALF OF THE STARCH OF THE COATING FORMULATION BY PURE POLYACRYLAMIDE OR A HIGH ARYLAMIDELOW ACRYLIC ACID COPOLYMER (COLORS A-D) GAVE COATING COLORS WHICH HAD UNDESIRABLY HIGH VISCOSITIES AND WHICH YIELDED POOR WET-RUB RESISTANCE VALUES.
References Cited (Backward Citations)
US2487448A
Cited
US2661309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |