US2377759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production from acetylene of aromatic hydrocarbons and of saturated and unsaturated hydrocarbons
Assignee: FIRM OF SYNBEN AG
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Filing: 1941-12-19
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Granted: 1945-06-05
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Expires: 1961-12-19
Abstract
No abstract record available.
Inventors
- 👤 Coupard Christian Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:38
CPC Classifications
C; C07; C07C; C07C2/00; B; B01; B01J; B01J27/00; B01J27/20; B01J27/22; C07C2527/00; C07C2527/20; C07C2527/22; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/911; Y10S585/913
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-06-04 | 1948-12-04 | 1949-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-06-04 | 1952-12-04 | 1953-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-06-04 | 1956-12-04 | 1957-06-05 | $7700.00 | Window Closed / Lapsed |