US2983626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur tetrafluoride as a surface treating agent
Assignee: EIDP Inc
•
Filing: 1957-08-20
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Granted: 1961-05-09
•
Expires: 1977-08-20
Abstract
No abstract record available.
Inventors
- 👤 Schneider Allan Kenneth
- 👤 Thomas John Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:10
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08B; C08B31/00; D; D06; D06M; D06M11/00; D06M11/51; D06M11/52; C08J2300/00; C08J2300/10; C08J2300/104; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31855; Y10T428/31909; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982; Y10T428/31986; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/2189
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
81 words
THE PROCESS OF RENDERING PREFORMED ORGANIC POLYMERIC MATERIAL INITIALLY SUSCEPTIBLE TO SWELLING BY WATER LESS SUSCEPTIBLE TO SUCH SWELLING WITHOUT SUBSTANTIAL CHANGE IN THE PHYSICAL FORM THEREOF WHICH COMPRISES CONTACTING SAID POLYMERIC MATERIAL WITH SULFUR TETRAFLUORIDE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AT A TEMPERATURE BETWEEN -20*C. AND THE DEGRADATION TEMPERATURE OF THE MATERIAL, SAID ORGANIC POLYMERIC MATERIAL HAVING (A) A MOLECULAR WEIGHT OF AT LEAST 1000, (B) A PLURALITY OF RECURRING HYDROXYL GROUPS, AND (C) A HYDROXYL EQUIVALENT OF AT LEAST 30.
Claim 2
Dependent Claim
81 words
THE PROCESS OF RENDERING PREFORMED ORGANIC POLYMERIC MATERIAL INITIALLY SUSCEPTIBLE TO SWELLING BY WATER LESS SUSCEPTIBLE TO SUCH SWELLING WITHOUT SUBSTANTIAL CHANGE IN THE PHYSICAL FORM THEREOF WHICH COMPRISES CONTACTING SAID POLYMERIC MATERIAL WITH SULFUR TETRAFLUORIDE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AT A TEMPERATURE BETWEEN -20*C. AND THE DEGRADATION TEMPERATURE OF THE MATERIAL, SAID ORGANIC POLYMERIC MATERIAL HAVING (A) A MOLECULAR WEIGHT OF AT LEAST 1000, (B) A PLURALITY OF RECURRING HYDROXYL GROUPS, AND (C) A HYDROXYL EQUIVALENT OF AT LEAST 30.
Claim 3
Dependent Claim
11 words
THE PROCESS OF CLAIM 1 WHEREIN THE SULFUR TETRAFLUORIDE IS GASEOUS.
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) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |