US3149176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodealkylation process
Assignee: Gulf Research and Development Co
•
Filing: 1961-07-13
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Granted: 1964-09-15
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Expires: 1981-07-13
Abstract
No abstract record available.
Inventors
- 👤 Edwin M Glazier
- 👤 Boro Fox Chapel
- 👤 Ralph W Helwig
- 👤 Vernon J Yeakley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:53
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/16; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/924
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |