Patent US3461052A successfully refreshed from Google Patents.
US3461052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing graft copolymers using radiation
Assignee: Zeneca Inc
•
Filing: 1967-01-03
•
Granted: 1969-08-12
•
Expires: 1987-01-03
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Restaino
- 👤 Weldon N Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:26
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/36; C; C08; C08B; C08B31/00; C08F; C08F251/00; D06; D06M; D06M14/00; D06M14/18; D06M14/26; D06M14/28; D21H17/03; D21H17/05; D21H17/18; D21H17/19
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2956899A
Cited
US3157527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-11 | 1973-02-10 | 1973-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-11 | 1977-02-10 | 1977-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-11 | 1981-02-10 | 1981-08-12 | $7700.00 | Window Closed / Lapsed |