US3523966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing aromatic isocyanates
Assignee: Olin Corp
•
Filing: 1966-04-01
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Granted: 1970-08-11
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Expires: 1986-04-01
Abstract
No abstract record available.
Inventors
- 👤 Gerhard F Ottmann
- 👤 Ehrenfried H Kober
- 👤 David F Gavin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:17
CPC Classifications
C; C07; C07C; C07C263/00; C07C263/14; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/54; B01J23/56; B01J23/70; B01J23/89; B01J27/00; B01J27/06
Claims Analysis
Total Claims: 0
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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) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |