US2902420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft copolymers
Assignee: Distillers Co Yeast Ltd
•
Filing: 1956-02-06
•
Granted: 1959-09-01
•
Expires: 1976-02-06
Abstract
No abstract record available.
Inventors
- 👤 Norrish Ronald George Wreyford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:30
CPC Classifications
C; C08; C08F; C08F257/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS FOR THE PRODUCTION OF GRAFT COPOLYMERS WHICH COMPRISES DISTRIBUTING A POLYMER CONTAINING POLYNUCLEAR AROMATIC HLYDROCARBON RESIDUES ATTACHED TO THE POLYMER CHAIN, IN A MEDIUM CONTAINING A POLYMERISABLE ETHYLENICALLY UNSATURATED MONOMER AND INITIATING THE POLYMERISATION OF THE MONOMER BY THE ACTION OF ULTRAVIOLET LIGHT UPON THE POLYMR CONTAINING THE POLYNNCLEAR AROMATIC HYDROCARBON RESIDUES.
Claim 2
Dependent Claim
54 words
A PROCESS FOR THE PRODUCTION OF GRAFT COPOLYMERS WHICH COMPRISES DISTRIBUTING A POLYMER CONTAINING POLYNUCLEAR AROMATIC HLYDROCARBON RESIDUES ATTACHED TO THE POLYMER CHAIN, IN A MEDIUM CONTAINING A POLYMERISABLE ETHYLENICALLY UNSATURATED MONOMER AND INITIATING THE POLYMERISATION OF THE MONOMER BY THE ACTION OF ULTRAVIOLET LIGHT UPON THE POLYMR CONTAINING THE POLYNNCLEAR AROMATIC HYDROCARBON RESIDUES.
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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |