US3577885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper coating composition
Assignee: HP SMITH PAPER Co AN ILL CORP
•
Filing: 1969-07-30
•
Granted: 1971-05-11
•
Expires: 1989-07-30
Abstract
Abstract A method for detecting coating transfer from a coated film which involves incorporating a fluorescent, ultraviolet lightdetachable material in the coating, applying the coating to one surface of the film and subsequently scanning a surface of the film to detect the presence of the fluorescent material.
Inventors
- 👤 Johnny L Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:20
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/64
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
20 words
The method of claim 1 in which the coated surface is scanned to detect transfer by nonuniformity of the coating.
Claim 2
Dependent Claim
23 words
The method of claim 1 in which the surface to which transfer is made is scanned to detect the presence of the coating.
Claim 3
Dependent Claim
30 words
The method of claim 1 in which the fluorescent compound is incorporated in the coating in an amount from about 0.001 to about 0.003 percent by weight of the coating.
Claim 4
Dependent Claim
29 words
The method of claim 1 in which the ultraviolet light detection means is adapted to indicate that portion of the film at which transfer of the coating is detected.
Claim 5
Dependent Claim
27 words
The method of claim 1 in which the coating is applied to a sheet of paper, the transfer being made to the matte surface of the paper.
Claim 6
Dependent Claim
24 words
The method of claim 1 in which the coating comprises silicone applied to the surface of a paper in the form of a solution.
Claim 7
Dependent Claim
28 words
The method of claim 1 in which a fluorescent, ultraviolet light-detectable material is incorporated in a silicone solution applied as a coating to the surface of the paper.
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |