US2850506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of ethylenic compounds
Assignee: Rohm and Haas Co
•
Filing: 1956-12-18
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Granted: 1958-09-02
•
Expires: 1976-12-18
Abstract
No abstract record available.
Inventors
- 👤 Fred E Boettner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:37
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/58; C07C51/60; C07C231/00; C07C231/22; C07C231/24; C07C253/00; C07C253/32; C07C253/34; C07C263/00; C07C263/04; C07C263/18; C07C67/00; C07C67/03; C08; C08F; C08F2/00; C08F2/38; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/952
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A PROCESS FOR PURIFYING POLYMERIZABLE MONOVINYLIDENE COMPOUNDS WHICH COMPRISES MIXING A SAID COMPOUND WITH 0L1% TO 5% OF A FULVENE OF THE STRUCTURE
Claim 2
Dependent Claim
15 words
A PROCESS ACCORDING TO CLAIM 4 IN WHICH THE VINYLIDENE COMPOUND IS A VOLATILIZABLE N-ALKYLMALEIMIDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |