Patent US2746944A successfully refreshed from Google Patents.
US2746944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing vinyl halide copolymers and copolymers produced thereby
Assignee: Shell Development Co
•
Filing: 1950-10-16
•
Granted: 1956-05-22
•
Expires: 1970-10-16
Abstract
No abstract record available.
Inventors
- 👤 Naps Marguerite
- 👤 Fred E Condo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:33
CPC Classifications
C; C08; C08F; C08F259/00; C08F259/02; C08F259/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |