US3086885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-clumping foamable thermoplastic polymer granules and method of making
Assignee: Dow Chemical Co
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Filing: 1960-09-22
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Granted: 1963-04-23
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Expires: 1980-09-22
Abstract
No abstract record available.
Inventors
- 👤 Alex K Jahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:41
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; C08J9/224; Y; Y10; Y10S; Y10S264/00; Y10S264/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A FREE-FLOWING COMPOSITION COMPRISING DISCRETE PARTICLES OF A FOAMABLE THERMOPLASTIC STYRENE POLYMER, NORMALLY SUSCEPTIBLE TO CLUMPING INTO AGGREGATES OF A PLURALITY OF SAID PARTICLES ADHERED TO ONE ANOTHER UPON EXPANDING BY HEATING, AND HAVING ON THE SURFACES OF SAID PARTICLES A COATING CONSISTING OF FROM 0.0005 TO 0.0500 PERCENT BY WEIGHT OF A FLUID POLYSILOXANE OF THE FORMULA R2SIO WHEREIN R IS RADICAL SELECTED FROM THE GROUP CONSISTING OF THE METHYL AND THE PHENYL RADICALS AND WHEREIN AT LEAST 75 PERCENT OF THE TOTAL R RADICALS IN SAID POLYSILOXANE ARE METHYL RADICALS.
Claim 2
Dependent Claim
92 words
A FREE-FLOWING COMPOSITION COMPRISING DISCRETE PARTICLES OF A FOAMABLE THERMOPLASTIC STYRENE POLYMER, NORMALLY SUSCEPTIBLE TO CLUMPING INTO AGGREGATES OF A PLURALITY OF SAID PARTICLES ADHERED TO ONE ANOTHER UPON EXPANDING BY HEATING, AND HAVING ON THE SURFACES OF SAID PARTICLES A COATING CONSISTING OF FROM 0.0005 TO 0.0500 PERCENT BY WEIGHT OF A FLUID POLYSILOXANE OF THE FORMULA R2SIO WHEREIN R IS RADICAL SELECTED FROM THE GROUP CONSISTING OF THE METHYL AND THE PHENYL RADICALS AND WHEREIN AT LEAST 75 PERCENT OF THE TOTAL R RADICALS IN SAID POLYSILOXANE ARE METHYL RADICALS.
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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |