US2734074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heater
Assignee: —
•
Filing: —
•
Granted: 1956-02-07
•
Expires: 1973-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:44
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C69/533; C07C69/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
PROCESS FOR THE SYNTHESIS OF ACRYLIC ESTERS WHICH COMPRISES PASSING A SUBSTANTIALLY ANHYDROUS MIXTURE OF VAPORS OF FORMALDEHYDE AND AN ALKYL ESER OF THE FORMULA R-CH2-COOR'', IN WHICH R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND LOWER ALKYL RADICALS AND R'' IS A LOWER ALKYL RADICAL, IN WHICH THE PROPORTION OF FORMALDEHYDE TO ESTER IS WITHIN THE RANGE OF 0.01 TO 0.1 MOL OF
Claim 2
Dependent Claim
66 words
PROCESS FOR THE SYNTHESIS OF ACRYLIC ESTERS WHICH COMPRISES PASSING A SUBSTANTIALLY ANHYDROUS MIXTURE OF VAPORS OF FORMALDEHYDE AND AN ALKYL ESER OF THE FORMULA R-CH2-COOR'', IN WHICH R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND LOWER ALKYL RADICALS AND R'' IS A LOWER ALKYL RADICAL, IN WHICH THE PROPORTION OF FORMALDEHYDE TO ESTER IS WITHIN THE RANGE OF 0.01 TO 0.1 MOL OF
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) | 1959-02-06 | 1959-08-08 | 1960-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-06 | 1963-08-08 | 1964-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-06 | 1967-08-08 | 1968-02-07 | $7700.00 | Window Closed / Lapsed |