Patent US2858237A successfully refreshed from Google Patents.
US2858237A
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Method for treating silicone rubber materials and treated articles thereby obtained
Assignee: Dow Chemical Co
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Filing: 1956-04-02
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Granted: 1958-10-28
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Expires: 1976-04-02
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm E Walles
- 👤 Robert B Ingraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:22
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/14; C08J2383/00; C08J2383/04; Y; Y10; Y10S; Y10S260/00; Y10S260/21; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
METHOD FOR TREATING SILICONE RUBBER AND SILICONE RUBBER MATERIALS AND FABRICATED ARTICLES COMPRISED OF COMPOSITIONS THAT CONTAIN SILICONE RUBBER SO AS TO OVERCOME THEIR HYDROPHOBIC CHARACTERISTICS AND TO IMPROVE THEIR WETTABILITY WHICH SILICONE RUBBER MATERIALS ARE COMPRISES OF POLYMERS THAT CONTAIN IN THEIR MOLECULES AT LEAST ABOUT 80 MOLE PERCENT OF DIMETHYL SILOXANE, SAID METHOD COMPRISING SUBJECTING THE SURFACE OF THE SILICONE RUBBER TO A CONCENTRATED SULFURIC ACID AND CONTAINS BETWEEN ABOUT 50 AND 96 PERCENT BY WEIGHT OF H2SO4 AT A TEMPERATURE BETWEEN THE FREEZING POINT AND THE BOILING POINT OF THE SULFURIC ACID UNTIL THE SURFACE AND SAID SILICONE RUBBER BECOMES HYDROPHILIC.
Claim 2
Dependent Claim
104 words
METHOD FOR TREATING SILICONE RUBBER AND SILICONE RUBBER MATERIALS AND FABRICATED ARTICLES COMPRISED OF COMPOSITIONS THAT CONTAIN SILICONE RUBBER SO AS TO OVERCOME THEIR HYDROPHOBIC CHARACTERISTICS AND TO IMPROVE THEIR WETTABILITY WHICH SILICONE RUBBER MATERIALS ARE COMPRISES OF POLYMERS THAT CONTAIN IN THEIR MOLECULES AT LEAST ABOUT 80 MOLE PERCENT OF DIMETHYL SILOXANE, SAID METHOD COMPRISING SUBJECTING THE SURFACE OF THE SILICONE RUBBER TO A CONCENTRATED SULFURIC ACID AND CONTAINS BETWEEN ABOUT 50 AND 96 PERCENT BY WEIGHT OF H2SO4 AT A TEMPERATURE BETWEEN THE FREEZING POINT AND THE BOILING POINT OF THE SULFURIC ACID UNTIL THE SURFACE AND SAID SILICONE RUBBER BECOMES HYDROPHILIC.
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) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |