US2789109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutralization of alkali metal hydroxide catalysts in organopolysiloxanes
Assignee: General Electric Co
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Filing: 1954-06-29
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Granted: 1957-04-16
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Expires: 1974-06-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Willard T Grubb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:39
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE PROCESS OF NEUTRALIZING THE ALKALI METAL HYDROXIDE IN AN ALKALI METAL HYDROXIDE POLYMERIZED ORGANOPOLYSILOXANE GUM IN WHICH THE ORGANO GROUPS ARE SELECTED FROM THE CLASS CONSISTING OF HYDROCARBON RADICALS AND HALOGENATED AROMATIC HYDROCARBON RADICALS, WHICH PROCESS COMPRISES (1) CONTACTING THE ORGANOPOLYSILOXANE GUM AFTER POLYMERIZATION WITH IODINE AND (2) HEATING THE PRODUCT OF (1) TO A TEMPERATURE ABOVE THE BOILING POINT OF IODINE TO EVAPORATE ANY EXCESS IODINE.
Claim 2
Dependent Claim
68 words
THE PROCESS OF NEUTRALIZING THE ALKALI METAL HYDROXIDE IN AN ALKALI METAL HYDROXIDE POLYMERIZED ORGANOPOLYSILOXANE GUM IN WHICH THE ORGANO GROUPS ARE SELECTED FROM THE CLASS CONSISTING OF HYDROCARBON RADICALS AND HALOGENATED AROMATIC HYDROCARBON RADICALS, WHICH PROCESS COMPRISES (1) CONTACTING THE ORGANOPOLYSILOXANE GUM AFTER POLYMERIZATION WITH IODINE AND (2) HEATING THE PRODUCT OF (1) TO A TEMPERATURE ABOVE THE BOILING POINT OF IODINE TO EVAPORATE ANY EXCESS IODINE.
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) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |