Patent US2668164A successfully refreshed from Google Patents.
US2668164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous copolymers of 3, 4 and 3, 5 dichloro-alpha-methylstyrene
Assignee: Aerojet Rocketdyne Holdings Inc
•
Filing: 1950-10-25
•
Granted: 1954-02-02
•
Expires: 1970-10-25
Abstract
No abstract record available.
Inventors
- 👤 Gilbert H Swart
- 👤 Grotenhuis Theodore A Te
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:20
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/14; C08F212/16; C08F212/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A SOLID INTERPOLYMERIZATION PRODUCT OF AT LEAST TWO DIFFERENT SUBSTITUTED ALPHA METHYL STYRENE LIQUIDS CONSISTING ESSENTIALLY OF (1) AT LEAST ONE ALPHA-METHYSTYRENE WHICH HAS AT LEAST ONE NUCLEAR SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF HALOGEN, TRIFLUOROMETHYL, METHYL AND HYDROGEN ON THE 3,4 OR 5 POSITIONS AND (2) AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF THE 3,4 AND 3,5 DIHALO-ALPHA-METHYLSTYRENES, ALL OF THE ALPHA-METHYLSTYRENES BEING CHARACTERIZED BY ABSENCE OF SUBSTITUENTS ON THE 2 AND 6 POSITIONS ON THE NUCLEUS.
Claim 2
Dependent Claim
81 words
A SOLID INTERPOLYMERIZATION PRODUCT OF AT LEAST TWO DIFFERENT SUBSTITUTED ALPHA METHYL STYRENE LIQUIDS CONSISTING ESSENTIALLY OF (1) AT LEAST ONE ALPHA-METHYSTYRENE WHICH HAS AT LEAST ONE NUCLEAR SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF HALOGEN, TRIFLUOROMETHYL, METHYL AND HYDROGEN ON THE 3,4 OR 5 POSITIONS AND (2) AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF THE 3,4 AND 3,5 DIHALO-ALPHA-METHYLSTYRENES, ALL OF THE ALPHA-METHYLSTYRENES BEING CHARACTERIZED BY ABSENCE OF SUBSTITUENTS ON THE 2 AND 6 POSITIONS ON THE NUCLEUS.
References Cited (Backward Citations)
US2522981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |