US3749683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bi-2-oxazoline and oxazine ethers and thioethers
Assignee: Dow Chemical Co
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Filing: 1972-01-24
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Granted: 1973-07-31
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Expires: 1992-01-24
Abstract
Abstract ((=N-CH2-(CH(-R''))N-CH2-O-)>C-R)2-X WHEREIN R IS ALKYLENE, PHENYLENE, VINYLENE, OR PHENYLENEALKYLENE, WHEREIN, "ALKYLENE" ALONE OR IN A COMBINED NAME, DESIGNATES AND ALKYLENE MOIETY THAT IS OF FROM 1 TO 10 CARBON ATOMS, AND X IS -S- OR -O-; N IS ZERO OR 1; OPTIONALLY ALSO WITH AN OXAZOLINE AS COMONOMER, ARE CATIONICALLY POLYMERIZED TO POLYMERS CONTAINING RECURRING UNITS OF THE FORMULA ((-)((CH2)G-N(-))M-CO-R)2-X AND, OPTIONALLY, ALSO UNITS OF THE FORMULA -CH2-CH2-N(-CO-R'')- WHEREIN G IS AN INTEGER 2 OR 3, M REPRESENTS THE DEGREE OF POLYMERIZATION, AND R'' IS HYDROGEN OR A SPECIFIED RADICAL.
Inventors
- 👤 D Tomalia
- 👤 J Paige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:30
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5046; C08G73/00; C08G73/02; C08G73/0233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |