US3439059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of divinylbenzenes from diacetylbenzenes
Assignee: Individual
•
Filing: 1968-01-02
•
Granted: 1969-04-15
•
Expires: 1988-01-02
Abstract
No abstract record available.
Inventors
- 👤 Ninel Iosifovna Yakovich
- 👤 Khachik Egorovich Khcheyan
- 👤 Larisa Borisovna Izrael
- 👤 Alexei Fedorovich Pavlichev
- 👤 Nina Nikolaevna Kondtratieva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:30
CPC Classifications
B; B01; B01J; B01J27/00; C; C07; C07C; C07C1/00; C07C1/20; C07C1/22; C07C2521/00; C07C2521/10; C07C2527/00; C07C2527/02; C07C2527/053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3153102A
Cited
US3375289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |