US3476824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of ethylenically unsaturated hydrocarbons with low acetylenic content
Assignee: Texas Petrochemicals Corp
•
Filing: 1966-09-20
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Granted: 1969-11-04
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Expires: 1986-09-20
Abstract
No abstract record available.
Inventors
- 👤 Marvin Z Woskow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:37
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/12; C07C11/173; C07C11/18; C07C11/16; C07C11/167; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; C07C5/42; C07C5/48
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) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |