Patent US3526676A successfully refreshed from Google Patents.
US3526676A
Expired / Lapsed
US
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Olefin preparation
Assignee: BP PLC
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Filing: 1965-11-15
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Granted: 1970-09-01
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Expires: 1985-11-15
Abstract
No abstract record available.
Inventors
- 👤 Leonard Turner
- 👤 Christopher Patrick C Bradshaw
- 👤 Eric James Howman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:34
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/28; C07C2523/32; C07C2523/36
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) | 1973-08-31 | 1974-03-02 | 1974-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-31 | 1978-03-02 | 1978-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-31 | 1982-03-02 | 1982-09-01 | $7700.00 | Window Closed / Lapsed |