Patent US2540949A successfully refreshed from Google Patents.
US2540949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of vinylcyclopropane and its homologues and derivatives
Assignee: Phillips Petroleum Co
•
Filing: 1946-02-25
•
Granted: 1951-02-06
•
Expires: 1966-02-25
Abstract
No abstract record available.
Inventors
- 👤 Jean P Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:34
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT MATERIALS WHICH COMPRISES POLYMERIZING A COMPOUND OF THE GENERAL FORMULA
Claim 2
Dependent Claim
17 words
A PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT MATERIALS WHICH COMPRISES POLYMERIZING A COMPOUND OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2366328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |