US3440232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of styrene compounds and dialkylamino hydroxypropyl methacrylates
Assignee: Dow Chemical Co
•
Filing: 1967-01-11
•
Granted: 1969-04-22
•
Expires: 1987-01-11
Abstract
No abstract record available.
Inventors
- 👤 Russell H Cramm
- 👤 Russell T Mcfadden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:32
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F20/00; C08F20/02; C08F20/10; C08F20/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA650550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |