Patent US3061577A successfully refreshed from Google Patents.
US3061577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of reacting an organic polymer with finely divided silica and resulting product
Assignee: EIDP Inc
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Filing: 1956-08-06
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Granted: 1962-10-30
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Expires: 1976-08-06
Abstract
No abstract record available.
Inventors
- 👤 Pruett Richard Dale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:19
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/42; C08G; C08G83/00; C08G83/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A POLYMERIC MATERIAL COMPRISING THE REACTION PRODUCT OF A SATURATED THERMOPLASTIC ORGANIC POLYMER AND FINELY-DIVIDED, SUBSTANTIALLY NON-POROUS PARTICLES OF SILICA, SAID PARTICLES OF SILICA HAVING THEIR GREATEST DIMENSION WITHIN THE RANGE FROM 0.001 MICRON TO ABOUT 0.1 MICRON,S, HAVING A SPECIFIC SURFACE AREA OF AT LEAST 100 SQUARE METERS PER GRAM AND BEING CHARACTERIZED BYA SURFACE LAYER OF HYDROXYL GROUPS, SAID SATURATED THERMOPLASTUC ORGANIC POLYMER BEING CHARACTERIZED BY A PLURALITY OF SIDE GROUPS DIRECTLY ATTACHED TO CARBON ATOMS IN THE POLYMER CHAIN, SAID CARBON ATOMS BEING SEPARATED FROM EACH OTHER BY AT LEAST TWO CARBON ATOMS IN EACH CHAIN, SAID SIDE GROUPS BEING SELECTED FROM THE GROUP CONSISTING OF -OH,
Claim 2
Dependent Claim
110 words
A POLYMERIC MATERIAL COMPRISING THE REACTION PRODUCT OF A SATURATED THERMOPLASTIC ORGANIC POLYMER AND FINELY-DIVIDED, SUBSTANTIALLY NON-POROUS PARTICLES OF SILICA, SAID PARTICLES OF SILICA HAVING THEIR GREATEST DIMENSION WITHIN THE RANGE FROM 0.001 MICRON TO ABOUT 0.1 MICRON,S, HAVING A SPECIFIC SURFACE AREA OF AT LEAST 100 SQUARE METERS PER GRAM AND BEING CHARACTERIZED BYA SURFACE LAYER OF HYDROXYL GROUPS, SAID SATURATED THERMOPLASTUC ORGANIC POLYMER BEING CHARACTERIZED BY A PLURALITY OF SIDE GROUPS DIRECTLY ATTACHED TO CARBON ATOMS IN THE POLYMER CHAIN, SAID CARBON ATOMS BEING SEPARATED FROM EACH OTHER BY AT LEAST TWO CARBON ATOMS IN EACH CHAIN, SAID SIDE GROUPS BEING SELECTED FROM THE GROUP CONSISTING OF -OH,
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |