US2647884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isocyanates and products prepared therefrom and methods of making the same
Assignee: Wyeth Holdings LLC
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Filing: 1950-03-31
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Granted: 1953-08-04
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Expires: 1970-03-31
Abstract
No abstract record available.
Inventors
- 👤 Vernon P Wystrach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:27
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/12; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/728; Y; Y10; Y10S; Y10S8/00; Y10S8/11
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
56 words
A CHEMICAL COMPOUND REPRESENTED BY THE GENERAL FORMULA RO-AR-N=C=O WHEREIN AR REPRESENTS A DIVALENT AROMATIC HYDROCARBON RADICAL, R REPRESENTS A MONOVALENT, PRIMARY, ETHYLENICALLY UNSATURATED, ALIPHATIC RADICAL HAVING AT LEAST 3 AND NOT MORE THAN 8 CARBON ATOMS, AND THE -OR AND -N=C=O GROUPINGS ARE EACH ATTACHED DIRECTLY TO THE AROMATIC NUCLEUS OF THE SAID DIVALENT RADICAL.
Claim 2
Dependent Claim
56 words
A CHEMICAL COMPOUND REPRESENTED BY THE GENERAL FORMULA RO-AR-N=C=O WHEREIN AR REPRESENTS A DIVALENT AROMATIC HYDROCARBON RADICAL, R REPRESENTS A MONOVALENT, PRIMARY, ETHYLENICALLY UNSATURATED, ALIPHATIC RADICAL HAVING AT LEAST 3 AND NOT MORE THAN 8 CARBON ATOMS, AND THE -OR AND -N=C=O GROUPINGS ARE EACH ATTACHED DIRECTLY TO THE AROMATIC NUCLEUS OF THE SAID DIVALENT RADICAL.
Claim 3
Dependent Claim
69 words
A COMPOSITION COMPRISING A PRODUCT OF POLYMERIZATION OF A POLYMERIZABLE MASS, SAID MASS INCLUDING A COMPOUND REPRESENTED BY THE GENERAL FORMULA RO-AR-N=C=O WHEREIN AR REPRESENTS A DIVALENT AROMATIC HYDROCARBON RADICAL, R REPRESENTS A MONOVALENT, PRIMARY, ETHYLENICALLY UNSATURATED, ALIPHATIC RADICAL HAVING AT LEAST 3 AND NOT MORE THAN 8 CARBON ATOMS, AND THE -OR AND -N=C=O GROUPINGS ARE EACH ATTACHED DIRECTLY TO THE AROMATIC NUCLEUS OF THE SAID DIVALENT RADICAL.
Claim 4
Dependent Claim
69 words
A COMPOSITION COMPRISING A PRODUCT OF POLYMERIZATION OF A POLYMERIZABLE MASS, SAID MASS INCLUDING A COMPOUND REPRESENTED BY THE GENERAL FORMULA RO-AR-N=C=O WHEREIN AR REPRESENTS A DIVALENT AROMATIC HYDROCARBON RADICAL, R REPRESENTS A MONOVALENT, PRIMARY, ETHYLENICALLY UNSATURATED, ALIPHATIC RADICAL HAVING AT LEAST 3 AND NOT MORE THAN 8 CARBON ATOMS, AND THE -OR AND -N=C=O GROUPINGS ARE EACH ATTACHED DIRECTLY TO THE AROMATIC NUCLEUS OF THE SAID DIVALENT RADICAL.
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) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |