Patent US3049468A successfully refreshed from Google Patents.
US3049468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of coloured paper
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1958-12-15
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Granted: 1962-08-14
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Expires: 1978-12-15
Abstract
No abstract record available.
Inventors
- 👤 Hinton Anthony John
- 👤 Morgan Victor Grayson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:32
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/28; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR THE PREPARATION OF PAPER COLORED WITH WATER-INSOLUBLE PIGMENT WHICH COMPRISES INCORPORATING IN THE PAPER DURING THE MANUFACTURE THEREOF SAID PIGMENT AND ABOUT 2.5 TO 25% BY WEIGHT OF THE PIGMENT OF AN ACID SALT OF A WATER-SOLUBLE CONDENSATION PRODUCT OBTAINED BY HEATING TO 70-200* C. UNDER ANHYDROUS CONDITIONS, A POLYALKYLENE POLYAMINE HAVING THE FORMULA
Claim 2
Dependent Claim
57 words
A PROCESS FOR THE PREPARATION OF PAPER COLORED WITH WATER-INSOLUBLE PIGMENT WHICH COMPRISES INCORPORATING IN THE PAPER DURING THE MANUFACTURE THEREOF SAID PIGMENT AND ABOUT 2.5 TO 25% BY WEIGHT OF THE PIGMENT OF AN ACID SALT OF A WATER-SOLUBLE CONDENSATION PRODUCT OBTAINED BY HEATING TO 70-200* C. UNDER ANHYDROUS CONDITIONS, A POLYALKYLENE POLYAMINE HAVING THE FORMULA
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |