US3080408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of dibenzyltin dichlorides
Assignee: Deutsche Advance Produktion GmbH
•
Filing: 1960-11-22
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Granted: 1963-03-05
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Expires: 1980-11-22
Abstract
No abstract record available.
Inventors
- 👤 Andreas Holger
- 👤 Klump Otto
- 👤 Menzel Ilse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:07
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/22; C07F7/2208
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A METHOD FOR THE PREPARATION OF DIBENZYLTIN DICHLORIDES COMPRISING HEATING COMMINUTED METALLIC TIN IN AN ORGANIC SOLVENT WITH STIRRING, ADDING A BENZYL CHLORIDE DROPWISE SLOWLY TO THE HEATED SOLUTION, AND AFTER TERMINATION OF THE ADDITION OF THE BENZYL CHLORIDE, MAINTAINING THE SOLUTION AT REACTION TEMPERATURE WITH STIRRING AT LEAST FOR ADDITIONAL THIRTY MINUTES.
Claim 2
Independent Claim
53 words
A METHOD FOR THE PREPARATION OF DIBENZYLTIN DICHLORIDES COMPRISING HEATING COMMINUTED METALLIC TIN IN AN ORGANIC SOLVENT WITH STIRRING, ADDING A BENZYL CHLORIDE DROPWISE SLOWLY TO THE HEATED SOLUTION, AND AFTER TERMINATION OF THE ADDITION OF THE BENZYL CHLORIDE, MAINTAINING THE SOLUTION AT REACTION TEMPERATURE WITH STIRRING AT LEAST FOR ADDITIONAL THIRTY MINUTES.
References Cited (Backward Citations)
GB469518A
Cited
US2679506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |