US3225000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of acrolein polymers with secondary amines
Assignee: Union Carbide Corp
•
Filing: 1961-06-09
•
Granted: 1965-12-21
•
Expires: 1981-06-09
Abstract
No abstract record available.
Inventors
- 👤 Frank J Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:57
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
17 words
THE STABLIZED COMPOSITION OF POLYACROLEIN, AND PHENOTHIAZINE IN AN AMOUNT SUFFICIENT TO STABLIZE SAID POLYACROLEIN AGAINST OXIDATION.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |