Patent US3189665A successfully refreshed from Google Patents.
US3189665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block copolymers
Assignee: Shell USA Inc
•
Filing: 1961-06-22
•
Granted: 1965-06-15
•
Expires: 1981-06-22
Abstract
No abstract record available.
Inventors
- 👤 Nozaki Kenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:57
CPC Classifications
C; C08; C08F; C08F291/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A NEW TYPE OF COPOLYMER WHEREIN THE MACROMOLECULES ARE MADE UP OF AT LEAST TWO DIFFERENT LINEAR SEGMENTS JOINED IN AN END-TO-END ARRANGEMENT, THE FIRST SEGMENT BEING A LINEAR POLYMER OF AN ALKENYL-SUBSTITUTED AROMATIC COMPOUND, AND THE OTHER SEGMENT BEING A POLYMER OF A MONOMER OF THE GROUP CONSISTING OF ESTERS OF UNSATURATED ALCOHOLS AND SATURATED MONOCARBOXYLIC ACIDS CONTAINING 1 TO 6 CARBON ATOMS, ALKENES, VINYL HALIDES, VINYLIDENE HALIDES, ETHYLENICALLY UNSATURATED NITRILES, ALKENYL ETHERS AND ALKENYL KETONES.
Claim 2
Dependent Claim
77 words
A NEW TYPE OF COPOLYMER WHEREIN THE MACROMOLECULES ARE MADE UP OF AT LEAST TWO DIFFERENT LINEAR SEGMENTS JOINED IN AN END-TO-END ARRANGEMENT, THE FIRST SEGMENT BEING A LINEAR POLYMER OF AN ALKENYL-SUBSTITUTED AROMATIC COMPOUND, AND THE OTHER SEGMENT BEING A POLYMER OF A MONOMER OF THE GROUP CONSISTING OF ESTERS OF UNSATURATED ALCOHOLS AND SATURATED MONOCARBOXYLIC ACIDS CONTAINING 1 TO 6 CARBON ATOMS, ALKENES, VINYL HALIDES, VINYLIDENE HALIDES, ETHYLENICALLY UNSATURATED NITRILES, ALKENYL ETHERS AND ALKENYL KETONES.
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) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |