Patent US4000400A successfully refreshed from Google Patents.
US2874146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric compositions
Assignee: Imperial Chemical Industries Ltd
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Filing: 1956-06-26
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Granted: 1959-02-17
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Expires: 1976-06-26
Abstract
No abstract record available.
Inventors
- 👤 Deverell-Smith Raymond
- 👤 Mitchell John
- 👤 Twitchett Harry James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:46
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/22; C08K5/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A COMPOSITION COMPRISING A POLYMER WHICH IS NORMALLY EFFECTED DELETERIOUSLY BY ULTRAVIOLET LIGHT SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ESTERS AND SOLID POLYMERS OF OLEFINIC MONOMERS HAVING INCORPORATED THEREIN A PIGMENT AND FROM 0.01% TO 10%, ON THE WEIGHT OF SIAD MATERIAL, OF A MONOAZO COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
50 words
A COMPOSITION COMPRISING A POLYMER WHICH IS NORMALLY EFFECTED DELETERIOUSLY BY ULTRAVIOLET LIGHT SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ESTERS AND SOLID POLYMERS OF OLEFINIC MONOMERS HAVING INCORPORATED THEREIN A PIGMENT AND FROM 0.01% TO 10%, ON THE WEIGHT OF SIAD MATERIAL, OF A MONOAZO COMPOUND OF THE FORMULA:
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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |