US2884359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of organic isocyanates
Assignee: GAF Chemicals Corp
•
Filing: 1956-10-31
•
Granted: 1959-04-28
•
Expires: 1976-10-31
Abstract
No abstract record available.
Inventors
- 👤 Bloom Albert
- 👤 Harlan B Freyermuth
- 👤 James B Normington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:46
CPC Classifications
C; C07; C07C; C07C263/00; C07C263/18; C07C263/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR RECOVERING AN ORGANIC ISOCYANATE FROM A CRUDE MIXTURE CONTAINING THE SAME, COMPRISING DISTILLING SAID ISOCYANATE FROM SAID MIXTURE IN THE PRESENCE OF ABOUT 25 TO 300%, BASED ON THE WEIGHT OF SAID ISOCYNATE, OF A SATURATED ALIPHATIC HYDROCARBON OF AT LEAST 9 CARBON ATOMS WHICH IS LIQUID UNDER THE CONDITIONS OF THE DISTILLATION.
Claim 2
Dependent Claim
56 words
A PROCESS FOR RECOVERING AN ORGANIC ISOCYANATE FROM A CRUDE MIXTURE CONTAINING THE SAME, COMPRISING DISTILLING SAID ISOCYANATE FROM SAID MIXTURE IN THE PRESENCE OF ABOUT 25 TO 300%, BASED ON THE WEIGHT OF SAID ISOCYNATE, OF A SATURATED ALIPHATIC HYDROCARBON OF AT LEAST 9 CARBON ATOMS WHICH IS LIQUID UNDER THE CONDITIONS OF THE DISTILLATION.
References Cited (Backward Citations)
US2757183A
Cited
US2706733A
Cited
US2680128A
Cited
US2680130A
Cited
US2680129A
Cited
US2819949A
Cited
GB761592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |