US3436433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dealkylation of alkyl substituted aromatic hydrocarbons
Assignee: Universal Oil Products Co
•
Filing: 1967-04-21
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Granted: 1969-04-01
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Expires: 1987-04-21
Abstract
No abstract record available.
Inventors
- 👤 George R Lester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:52
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/20; B; B01; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8933; B01J23/8993; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/16; C07C2523/24; C07C2523/26; C07C2523/70; C07C2523/74; C07C2523/745; C07C2523/89; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3222132A
Cited
US3306944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |