US2729666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyl-aryl diisocyanates with reduced activity
Assignee: EIDP Inc
•
Filing: 1952-07-21
•
Granted: 1956-01-03
•
Expires: 1972-07-21
Abstract
No abstract record available.
Inventors
- 👤 Stallmann Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:55
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/12; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; Y; Y10; Y10S; Y10S8/00; Y10S8/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
AN ORGANIC DIISOCYANATE HAVING ONE OF ITS-NCO GROUPS ATTACHED TO AN AROMATIC RADICAL AND ITS OTHER -NCO GROUP ATTACTED TO A CARBON BEARING TWO LOWER ALIPHATIC HYDROCARBON GROUPS WHICH MAY BE JOINED TOGETHER TO FROM A CYCLOALIPHATIC RING WITH THE ATTACHED CARBON, THE SAID CARBON BEING ATTACTED TO THE SAID AROMATIC RADICAL.
Claim 2
Dependent Claim
52 words
AN ORGANIC DIISOCYANATE HAVING ONE OF ITS-NCO GROUPS ATTACHED TO AN AROMATIC RADICAL AND ITS OTHER -NCO GROUP ATTACTED TO A CARBON BEARING TWO LOWER ALIPHATIC HYDROCARBON GROUPS WHICH MAY BE JOINED TOGETHER TO FROM A CYCLOALIPHATIC RING WITH THE ATTACHED CARBON, THE SAID CARBON BEING ATTACTED TO THE SAID AROMATIC RADICAL.
References Cited (Backward Citations)
US2621166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |