US3472897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of nitrobenzene
Assignee: WR Grace and Co
•
Filing: 1966-12-22
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Granted: 1969-10-14
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Expires: 1986-12-22
Abstract
No abstract record available.
Inventors
- 👤 James N Pryor
- 👤 Orville A Wunderlich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:25
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/30; C07C209/32; C07C209/36; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/44; B01J21/00; B01J21/02; B01J21/04; B01J37/00; B01J37/02; B01J37/03
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) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |