Patent US3523962A successfully refreshed from Google Patents.
US3523962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing organic isocyanates
Assignee: Olin Corp
•
Filing: 1967-04-06
•
Granted: 1970-08-11
•
Expires: 1987-04-06
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
2026-11-01 18:03
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0234; B01J31/0255; B01J31/0267; B01J31/0268; B01J31/16; B01J31/18; B01J31/1845; B01J31/185; B01J31/24; B01J31/2404; B01J31/26; B01J31/28; B01J31/30; B01J31/32; C; C07; C07C; C07C263/00; C07C263/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3110747A
Cited
US3405156A
Cited
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 |