US2625559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of methyl tin chlorides
Assignee: Union Carbide Corp
•
Filing: 1949-02-04
•
Granted: 1953-01-13
•
Expires: 1969-02-04
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:14
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/22; C07F7/2208
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
22 words
A METHOD OF PREPARING METHYL TIN CHLORIDES WHICH COMPRISES REACTING METHYL CHLORIDE WITH TIN IN THE PRESENCE OF COPPER AS A CATALYST.
References Cited (Backward Citations)
US1639947A
Cited
US2444270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-13 | 1956-07-14 | 1957-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-13 | 1960-07-14 | 1961-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-13 | 1964-07-14 | 1965-01-13 | $7700.00 | Window Closed / Lapsed |