US3686371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing copolymerizable compound containing functional group of phosphoric acid
Assignee: Individual
•
Filing: 1969-05-22
•
Granted: 1972-08-22
•
Expires: 1989-05-22
Abstract
Abstract A copolymerizable monomer containing a functional group of a phosphoric acid is prepared by reacting a monomeric compound containing a hydroxyl radical and an unsaturated double bond with phosphorus pentaoxide by dropping 1 mole of phosphorus pentaoxide into at least 1.8 moles of the monomeric compound at a liquid temperature from 20* to 100* C and then adding at least 1 mole of water.
Inventors
- 👤 Tadashi Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:04
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C08; C08F; C08F30/00; C08F30/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A method of claim 1 wherein a monomeric compound having a hydroxyl radical and an unsaturated double bond is 2-hydroxyethyl methacrylate.
Claim 2
Dependent Claim
21 words
A method of claim 1 wherein a monomeric compound having a hydroxyl radical and an unsaturated double bond is allyl alcohol.
References Cited (Backward Citations)
US2745863A
Cited
US3331896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |