Patent US2612490A successfully refreshed from Google Patents.
US2612490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homogeneous polymerization of vinylidene compounds with an alpha, alpha-dialkylarylmethyl hydroperoxide and a heavy metal compound as catalyst
Assignee: Hercules Powder Co
•
Filing: 1948-12-24
•
Granted: 1952-09-30
•
Expires: 1968-12-24
Abstract
No abstract record available.
Inventors
- 👤 Charles W Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:47
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28; C08F4/32; Y; Y10; Y10S; Y10S260/00; Y10S260/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE PROCESS WHICH COMPRISES HOMOGENEOUSLY POLYMERIZING A MONOMERIC COMPOUND CONTAINING THE CH2=C< GROUP AND WHICH IS CAPABLE OF BEING POLYMERIZED BY THE PEROXIDE CATALYST, IN THE PRESENCE OF A CATALYST COMPRISING AN A,A-DIALKYLARYLMETHYL HYDROPEROXIDE IN WHICH EACH ALKYL GROUP CONTAINS NOT MORE THAN 4 CARBON ATOMS AND A HEAVY METAL ACETYLACETONATE.
Claim 2
Dependent Claim
51 words
THE PROCESS WHICH COMPRISES HOMOGENEOUSLY POLYMERIZING A MONOMERIC COMPOUND CONTAINING THE CH2=C< GROUP AND WHICH IS CAPABLE OF BEING POLYMERIZED BY THE PEROXIDE CATALYST, IN THE PRESENCE OF A CATALYST COMPRISING AN A,A-DIALKYLARYLMETHYL HYDROPEROXIDE IN WHICH EACH ALKYL GROUP CONTAINS NOT MORE THAN 4 CARBON ATOMS AND A HEAVY METAL ACETYLACETONATE.
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) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |