US3278622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyalkylindans
Assignee: POLAK'S FRUTAL WORKS Inc
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Filing: 1964-03-16
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Granted: 1966-10-11
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Expires: 1984-03-16
Abstract
No abstract record available.
Inventors
- 👤 Stofberg Jan
- 👤 Kees N Nieuwland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:00
CPC Classifications
C; C11; C11B; C11B9/00; C11B9/0042; C11B9/0046; C11B9/0049; C11B9/0053; C07; C07C; C07C2/00; C07C2/86; C07C2/862; C07C2/864; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054; C07C2531/00; C07C2531/02; C07C2531/025; C07C2531/04; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/08; C07C2602/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
THE PROCESS FOR PREPARING POLYALKYLINDANS WHICH COMPRISES REACTING IN THE PRESENCE OF AN ACID ACTING CATALYST, A STYRENE HYDROCARBON HAVING THE FORMULA:
Claim 2
Dependent Claim
22 words
THE PROCESS FOR PREPARING POLYALKYLINDANS WHICH COMPRISES REACTING IN THE PRESENCE OF AN ACID ACTING CATALYST, A STYRENE HYDROCARBON HAVING THE FORMULA:
References Cited (Backward Citations)
US2851501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |