Patent US945451A successfully refreshed from Google Patents.
US2740802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Di(trihalosilyl) alkenes and method for preparation thereof
Assignee: Union Carbide Corp
•
Filing: 1952-12-13
•
Granted: 1956-04-03
•
Expires: 1972-12-13
Abstract
No abstract record available.
Inventors
- 👤 George H Wagner
- 👤 Arthur N Pines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:56
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12; C07F7/121; C07F7/127
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
PROCESS OF DEHYDROHALOGENATING A DI(TRIHALOSILYL)MONOHALOALKANE CONTAINING FROM 2 TO 5 CARBON ATOMS WHICH COMPRISES HEATING SAID HALOALKANE IN THE PRESENCE OF ALUMINUM CHLORIDE AT A TEMPERATURE OF FROM ABOUT 100* C. TO ABOUT 200* C.
Claim 2
Dependent Claim
35 words
PROCESS OF DEHYDROHALOGENATING A DI(TRIHALOSILYL)MONOHALOALKANE CONTAINING FROM 2 TO 5 CARBON ATOMS WHICH COMPRISES HEATING SAID HALOALKANE IN THE PRESENCE OF ALUMINUM CHLORIDE AT A TEMPERATURE OF FROM ABOUT 100* C. TO ABOUT 200* C.
References Cited (Backward Citations)
US2642477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |