Patent US3300437A successfully refreshed from Google Patents.
US3300437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treated expandable beads and composition therefor
Assignee: Minerals and Chemicals Philipp Corp
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Filing: 1964-01-28
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Granted: 1967-01-24
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Expires: 1984-01-28
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Ferrigno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:12
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; C08J9/224; C08J2325/00; C08J2325/02; C08J2325/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
A FREE-FLOWING COMPOSITION COMPRISING A NORMALLY SOLID NONPOROUS FOAMABLE STYRENE POLYMER IN THE FORM OF BEADS WHICH WHEN EXPANDED BY HEATING ARE NORMALLY SUSCEPTIBLE TO AGGLOMERATION OF PARTICLES ONE TO EACH OTHER, AND UNIFORMLY COATED ON THE SURFACE OF SAID BEADS AS AN AGENT TO PREVENT SAID AGGLOMERATION, FROM 1/4% TO 2%, BASED ON THE WEIGHT OF SAID BEADS, OF AN ADHERENT COATING CONSISTING OF MINUS 44 MICRON PARTICLES OF KAOLIN CLAY HAVING AN AVERAGE PARTICLE SIZE WITHIN THE RANGE OF 0.5 TO 5.0 MICRONS, THE SURFACES OF WHICH ARE UNIFORMLY COATED WITH FROM ABOUT 3% TO 10%, BASED ON THE WEIGHT OF SAID CLAY, OF A TOTALLY HYDROXYPROPYLATED ALKYLENE DIAMINE OF THE FORMULA:
References Cited (Backward Citations)
CA592000A
Cited
US3172867A
Cited
US2739075A
Cited
US2697118A
Cited
US3029209A
Cited
US3056752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |