US2838554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making organotin maleates
Assignee: Primerica Inc
•
Filing: 1954-04-15
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Granted: 1958-06-10
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Expires: 1974-04-15
Abstract
No abstract record available.
Inventors
- 👤 Carl R Gloskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:58
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/22; C07F7/2224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A METHOF FOR PREPARING ANHYDROUS HYDROCARBONTIN MALEATES WHICH COMPRISES REACTING SUBSTANTIALLY STOICHIOMETRIC AMOUNTS OF MALEIC ANHYDRIDE AND A HYDROCARBONTIN OXIDE SELECTED FROM THE CLASS CONSISTING OF ALKYLTIN OXIDES, MONOCYCLIC HYDROCARBONARYLTIN OXIDES AND MONOCYCLIC HYDROCARBONARALKYLTIN OXIDES UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AND IN THE PRESENCE OF AN INERT ORGANIC SOLVENT AS REACTION MEDIUM AND RECOVERING SUBSTANTIALLY ANDYDROUS HYDROCARBONTIN MALEATE.
Claim 2
Dependent Claim
57 words
A METHOF FOR PREPARING ANHYDROUS HYDROCARBONTIN MALEATES WHICH COMPRISES REACTING SUBSTANTIALLY STOICHIOMETRIC AMOUNTS OF MALEIC ANHYDRIDE AND A HYDROCARBONTIN OXIDE SELECTED FROM THE CLASS CONSISTING OF ALKYLTIN OXIDES, MONOCYCLIC HYDROCARBONARYLTIN OXIDES AND MONOCYCLIC HYDROCARBONARALKYLTIN OXIDES UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AND IN THE PRESENCE OF AN INERT ORGANIC SOLVENT AS REACTION MEDIUM AND RECOVERING SUBSTANTIALLY ANDYDROUS HYDROCARBONTIN MALEATE.
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |