US2632729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization by glow-discharge electrolysis
Assignee: Rohm and Haas Co
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Filing: 1949-07-02
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Granted: 1953-03-24
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Expires: 1969-07-02
Abstract
No abstract record available.
Inventors
- 👤 John F Woodman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:01
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46; C08F2/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR POLYMERIZING A MONOMERIC, LIQUID, WATER-INSOLUBLE MATERIAL WHICH CONTAINS A VINYLIDENE GROUP AND WHICH UNDERGOES ADDITION POLYMERIZATION WHICH COMPRISES DISPERSING SAID MONOMERIC LIQUID IN AN AQUEOUS SOLUTION OF AN ELECTROLYTE, REDUCING THE GASEOUS PRESSURE ABOVE THE SURFACE OF THE DISPERSION TO LESS THAN 125 MM. OF MERCURY, CIRCULATING AND SUBJECTING SAID DISPERSION TO GLOW-DISCHARGE ELECTROLYSIS IN WHICH A GLOW-DISCHARGE BETWEEN A POSITIVE ELECTRODE PLACED IMMEDIATELY ABOVE THE SURFACE OF SAID DISPERSION AND SAID SURFACE IS MAINTAINED BY THE PASSAGE OF AN ELECTRIC CURRENT BETWEEN SAID ELECTRODE AND A NEGATIVE ELECTRODE IMMERSED IN SAID AQUEOUS DISPERSION.
Claim 2
Dependent Claim
97 words
A PROCESS FOR POLYMERIZING A MONOMERIC, LIQUID, WATER-INSOLUBLE MATERIAL WHICH CONTAINS A VINYLIDENE GROUP AND WHICH UNDERGOES ADDITION POLYMERIZATION WHICH COMPRISES DISPERSING SAID MONOMERIC LIQUID IN AN AQUEOUS SOLUTION OF AN ELECTROLYTE, REDUCING THE GASEOUS PRESSURE ABOVE THE SURFACE OF THE DISPERSION TO LESS THAN 125 MM. OF MERCURY, CIRCULATING AND SUBJECTING SAID DISPERSION TO GLOW-DISCHARGE ELECTROLYSIS IN WHICH A GLOW-DISCHARGE BETWEEN A POSITIVE ELECTRODE PLACED IMMEDIATELY ABOVE THE SURFACE OF SAID DISPERSION AND SAID SURFACE IS MAINTAINED BY THE PASSAGE OF AN ELECTRIC CURRENT BETWEEN SAID ELECTRODE AND A NEGATIVE ELECTRODE IMMERSED IN SAID AQUEOUS DISPERSION.
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) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |