Patent US2940947A successfully refreshed from Google Patents.
US2940947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of incorporating silicone oil coated silica into fluorinated polymers
Assignee: Columbia Southern Chemical Corp
•
Filing: 1957-11-25
•
Granted: 1960-06-14
•
Expires: 1977-11-25
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Welch
- 👤 Ralph F Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:57
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08K; C08K9/00; C08K9/08; C08J2483/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
THE METHOD WHICH COMPRISES ADMIXING A SILICONECOATED, FINELY-DIVIDED HYDRATED SILICA HAVING A SURFACE AREA OF 25 TO 300 SQUARE METERS PER GRAM AND AN AVERAGE ULTIMATE PARTICLE SIZE BELOW 0.1 MICRON WITH A SOLID LINEAR POLYMER AND MILLING SAID MIXTURE, SAID SILICONE HAVING THE GENERAL FORMULA.
Claim 2
Independent Claim
46 words
THE METHOD WHICH COMPRISES ADMIXING A SILICONECOATED, FINELY-DIVIDED HYDRATED SILICA HAVING A SURFACE AREA OF 25 TO 300 SQUARE METERS PER GRAM AND AN AVERAGE ULTIMATE PARTICLE SIZE BELOW 0.1 MICRON WITH A SOLID LINEAR POLYMER AND MILLING SAID MIXTURE, SAID SILICONE HAVING THE GENERAL FORMULA.
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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |