US3640749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fixing images consisting of dry powders on paper
Assignee: US Philips Corp
•
Filing: 1969-03-11
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Granted: 1972-02-08
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Expires: 1989-03-11
Abstract
Abstract Dry powder images are fixed on paper by treating the powder image coated paper with an aqueous dispersion of a film forming synthetic resin.
Inventors
- 👤 Rainer Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:38
CPC Classifications
G; G03; G03G; G03G11/00; G03G13/00; G03G13/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
37 words
The method of claim 1 wherein for each square meter of paper 4 to 8 grams of the dispersion are employed and the synthetic resin employed forms a film below the temperature employed in the coating step.
Claim 2
Dependent Claim
11 words
The method of claim 1 wherein a predried paper is employed.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein the dispersion contains fillers and pigmentation agents in addition to the synthetic resin.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein the aqueous dispersion is applied to the paper by means of a follower roller.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |