US3472876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin epoxidation
Assignee: Shell USA Inc
•
Filing: 1967-08-18
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Granted: 1969-10-14
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Expires: 1987-08-18
Abstract
No abstract record available.
Inventors
- 👤 Harvey S Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:23
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2226; B01J31/2243; C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/06; C07D303/00; C07D303/02; C07D303/04; B01J2231/00; B01J2231/70; B01J2231/72; B01J2531/00; B01J2531/02; B01J2531/0238; B01J2531/0241; B01J2531/0252; B01J2531/80; B01J2531/84; B01J2531/845
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 |