US3140305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of diisocyanates
Assignee: FMC Corp
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Filing: 1962-12-17
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Granted: 1964-07-07
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Expires: 1982-12-17
Abstract
No abstract record available.
Inventors
- 👤 Jack G Lowenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:53
CPC Classifications
B; B01; B01J; B01J10/00; B01J10/02; C; C07; C07C; C07C263/00; C07C263/18; C07C263/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS FOR THE RECOVERY OF AN AROMATIC DIISOCYANATE FROM AN AROMATIC DIISOCYANATE DISTILLATION RESIDUE COMPRISING PASSING SAID RESIDUE IN THE FORM OF A THIN FILM OVER A HEATED SURFACE, THEREBY CONVERTING ISOCYANATE-CONTAINING AROMATIC COMPOUNDS PRESENT IN THE RESIDUE TO AN AROMATIC DIISOCYANATE AND DISTILLING SAID AROMATIC DIISOCYANATE THEREFROM.
Claim 2
Dependent Claim
49 words
A PROCESS FOR THE RECOVERY OF AN AROMATIC DIISOCYANATE FROM AN AROMATIC DIISOCYANATE DISTILLATION RESIDUE COMPRISING PASSING SAID RESIDUE IN THE FORM OF A THIN FILM OVER A HEATED SURFACE, THEREBY CONVERTING ISOCYANATE-CONTAINING AROMATIC COMPOUNDS PRESENT IN THE RESIDUE TO AN AROMATIC DIISOCYANATE AND DISTILLING SAID AROMATIC DIISOCYANATE THEREFROM.
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |