US2873287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing vinyltin compounds
Assignee: Primerica Inc
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Filing: 1956-05-09
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Granted: 1959-02-10
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Expires: 1976-05-09
Abstract
No abstract record available.
Inventors
- 👤 Hugh E Ramsden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:37
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/22; C07F7/2208; C08; C08K; C08K5/00; C08K5/56; C08K5/57; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/929; Y10S585/00; Y10S585/929; Y10S585/93; Y10S585/931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN A PROCESS FOR THE PREPARATION OF A VINYLIC TIN COMPOUND WHICH COMPRISES REACTING A VINYLIC MAGNESIUM CHLORIDE COMPOUND WITH A TIN COMPOUND HAVING A TIN ATOM BONDED TO AT LEAST ONE HALOGEN ATOM, THE STEP WHICH COMPRISES CARRYING OUT THE REACTION IN THE PREENCE OF AT LEAST ONE MOLE OF A CYCLIC ETHER FOR EVERY MOLE OF VINYLIC MAGNESIUM CHLORIDE USED, SAID CYCLIC ETHER BEING SELECTED FROM THE CLASS CONSISTING OF TETRAHYDROFURANS, TETRAHYDROPYRANS, DIHYDROPYRANS, AND NMETHYLMORPHOLINES, WITH THE FURTHER RESTRICTION THAT SAID CYCLIC ETHERS CONTAIN NOT MORE THAN ONE DOUBLE BOND IN THE RING AND THAT AT LEAST ONE CARBON ATOM ADJACENT THE OXYGEN ATOM IN SAID CYCLIC ETHER IS FREE OF ANY SUBSTITUENTS OTHER THAN HYDROGEN.
Claim 2
Dependent Claim
118 words
IN A PROCESS FOR THE PREPARATION OF A VINYLIC TIN COMPOUND WHICH COMPRISES REACTING A VINYLIC MAGNESIUM CHLORIDE COMPOUND WITH A TIN COMPOUND HAVING A TIN ATOM BONDED TO AT LEAST ONE HALOGEN ATOM, THE STEP WHICH COMPRISES CARRYING OUT THE REACTION IN THE PREENCE OF AT LEAST ONE MOLE OF A CYCLIC ETHER FOR EVERY MOLE OF VINYLIC MAGNESIUM CHLORIDE USED, SAID CYCLIC ETHER BEING SELECTED FROM THE CLASS CONSISTING OF TETRAHYDROFURANS, TETRAHYDROPYRANS, DIHYDROPYRANS, AND NMETHYLMORPHOLINES, WITH THE FURTHER RESTRICTION THAT SAID CYCLIC ETHERS CONTAIN NOT MORE THAN ONE DOUBLE BOND IN THE RING AND THAT AT LEAST ONE CARBON ATOM ADJACENT THE OXYGEN ATOM IN SAID CYCLIC ETHER IS FREE OF ANY SUBSTITUENTS OTHER THAN HYDROGEN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |