US3531509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of o-isocyanato-benzoyl chlorides
Assignee: Pharmacia and Upjohn Co
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Filing: 1966-12-20
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Granted: 1970-09-29
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Expires: 1986-12-20
Abstract
No abstract record available.
Inventors
- 👤 Adnan A R Sayigh
- 👤 Henri Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:11
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/12; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7843
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB752105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |