Patent US3442964A successfully refreshed from Google Patents.
US3442964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of detergent alkylate
Assignee: British Hydrocarbon Chemicals Ltd
•
Filing: 1965-01-12
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Granted: 1969-05-06
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Expires: 1985-01-12
Abstract
No abstract record available.
Inventors
- 👤 Wilfred John Oldham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:51
CPC Classifications
C; C07; C07C; C07C309/00; C07C15/00; C07C15/02; C07C15/107; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/16; C07C2/20; C07C2/22; C07C2521/00; C07C2521/02; C07C2521/06; C07C2521/08; C07C2521/12; C07C2521/14; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/06; C07C2527/128; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2718526A
Cited
GB852079A
Cited
US3109869A
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GB910540A
Cited
GB913795A
Cited
US3238249A
Cited
US3351654A
Cited
US3196174A
Cited
US3214462A
Cited
US3317628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |