US2569492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of organo-tin compounds
Assignee: MW Kellogg Co
•
Filing: 1949-12-20
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Granted: 1951-10-02
•
Expires: 1969-12-20
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Passino
- 👤 Russell M Mantell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:02
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/22; C07F7/2208
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A PROCESS FOR PRODUCING DIBUTYL TIN DICHLORIDE WHEREIN REAGENTS ARE INTERACTED TO PRODUCE A LIQUID PRODUCT MIXTURE COMPRISING SAID DIBUTYL TIN DICHLORIDE, STANNOUS CHLORIDE AND AT LEAST ONE BUTYL TIN COMPOUND LOWER MELTING THAN DIBUTYL TIN DICHLORIDE, THE METHOD OF RECOVERING A RELATIVELY PURE DIBUTYL TIN DICHLORIDE PRODUCT WHICH COMPRISES THE STEP OF WASHING A LIQUID MXITURE COMPRISING SAID DIBUTYL TIN DICHLORIDE AND STANNOUS CHLORIDE WITH WATER TO DISSOLVE STANNOUS CHLORIDE IN THE WATER AND SEPARATE IT FROM DIBUTYL TIN DICHLORIDE, AND THE STEP OF COOLING A LIQUID MIXTURE COMPRISING SAID DIBUTYL TIN DICHLORIDE AND SAID BUTYL TIN COMPOUND TO SEPARATE CRYSTALS CONTAINING DIBUTYL TIN DICHLORIDE AND SUBSTANTIALLY FREE FROM SAID BUTYL TIN COMPOUND.
Claim 2
Dependent Claim
115 words
IN A PROCESS FOR PRODUCING DIBUTYL TIN DICHLORIDE WHEREIN REAGENTS ARE INTERACTED TO PRODUCE A LIQUID PRODUCT MIXTURE COMPRISING SAID DIBUTYL TIN DICHLORIDE, STANNOUS CHLORIDE AND AT LEAST ONE BUTYL TIN COMPOUND LOWER MELTING THAN DIBUTYL TIN DICHLORIDE, THE METHOD OF RECOVERING A RELATIVELY PURE DIBUTYL TIN DICHLORIDE PRODUCT WHICH COMPRISES THE STEP OF WASHING A LIQUID MXITURE COMPRISING SAID DIBUTYL TIN DICHLORIDE AND STANNOUS CHLORIDE WITH WATER TO DISSOLVE STANNOUS CHLORIDE IN THE WATER AND SEPARATE IT FROM DIBUTYL TIN DICHLORIDE, AND THE STEP OF COOLING A LIQUID MIXTURE COMPRISING SAID DIBUTYL TIN DICHLORIDE AND SAID BUTYL TIN COMPOUND TO SEPARATE CRYSTALS CONTAINING DIBUTYL TIN DICHLORIDE AND SUBSTANTIALLY FREE FROM SAID BUTYL TIN COMPOUND.
References Cited (Backward Citations)
US2431038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |