US3894836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper dye
Assignee: Individual
•
Filing: 1971-07-23
•
Granted: 1975-07-15
•
Expires: 1991-07-23
Abstract
Abstract Paper dye of the formula ESPECIALLY IN LIQUID OR GRANULATED FORM.
Inventors
- 👤 Alfred Frei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:16
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/28; C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/08; C09B35/10; C09B35/14; C09B45/00; C09B45/02; C09B45/24; C09B45/28; C09B67/00; C09B67/0071; C09B67/0072; C09B67/0073; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/919
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
45 words
A PROCESS FOR PRODUCING COLORED PAPER COMPRISING (A) INCORPORATING INTO PAPER STOCK AN EFFECTIVE AMOUNT OF A DYE AND FORMING PAPER FROM SAID PAPER STOCK OR (B) TREATING PAPER SHEET WITH AN EFFECTIVE AMOUNT OF A DYE, SAID DYE BEING THE COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
45 words
A PROCESS FOR PRODUCING COLORED PAPER COMPRISING (A) INCORPORATING INTO PAPER STOCK AN EFFECTIVE AMOUNT OF A DYE AND FORMING PAPER FROM SAID PAPER STOCK OR (B) TREATING PAPER SHEET WITH AN EFFECTIVE AMOUNT OF A DYE, SAID DYE BEING THE COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
20 words
A process according to claim 1 comprising treating paper sheet with an effective amount of the compound of the formula
Claim 4
Dependent Claim
24 words
A process according to claim 2 comprising applying to paper sheet an effective amount of an aqueous solution of the compound of the formula
Claim 5
Dependent Claim
20 words
A process according to claim 1 comprising incorporating into paper stock an effective amount of the compound of the formula
Claim 6
Dependent Claim
24 words
A process according to claim 4 comprising incorporating into paper stock an effective amount of an aqueous solution of the compound of the formula
Claim 7
Dependent Claim
21 words
A process according to claim 5 wherein said aqueous solution comprises 1 part by weight of the compound of the formula
Claim 8
Dependent Claim
16 words
A process according to claim 6 wherein said amino alcohol is a compound of the formula
Claim 9
Dependent Claim
24 words
A process according to claim 4 comprising incorporating into paper stock an effective amount of a granular composition comprising the compound of the formula
Claim 10
Dependent Claim
47 words
A process according to claim 8 wherein said salt that dissociates in water is sodium chloride, potassium chloride, sodium sulfate, potassium sulfate, monosodiUm phosphate, disodium phosphate, sodium pyrophosphate, potassium pyrophosphate, sodium carbonate or potassium carbonate and the average size of the granules is 40 to 120 microns.
Claim 11
Dependent Claim
17 words
A process according to claim 4 comprising admixing an effective amount of the compound of the formula
Claim 12
Dependent Claim
8 words
Paper produced by the process of claim 1.
Claim 13
Dependent Claim
8 words
Paper produced by the process of claim 4.
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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |