US3056752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating heat-expansible resin particles with a solution of perfluorooctanoic acid and coated composition obtained thereby
Assignee: Dow Chemical Co
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Filing: 1960-12-29
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Granted: 1962-10-02
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Expires: 1980-12-29
Abstract
No abstract record available.
Inventors
- 👤 Maurice L Zweigle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:37
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; C08J9/224; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A METHOD OF INHIBITING THE COHESION OF HEAT-EXPANSIBLE, THERMOPLASTIC, RESINOUS PARTICLES WHEN SAID PARTICLES ARE HEATED TO A TEMPERATURE WHICH IS SUFFICIENTLY HIGH TO CAUSE SUBSTANTIAL EXPANSION THEREOF WITH RESULTANT FORMATION OF PREFOAMED PARTICLES CAPABLE OF FURTHER FOAMING UP, WHICH METHOD COMPRISES DEPOSITING ON SAID PARTICLES FROM ABOUT 30 TO ABOUT 500 PARTS PER MILLION, BASED ON THE TOTAL WEIGHT OF SAID PARTICLES, OF PERFLUOROOCTANOIC ACID PRIOR TO HEATING TO SAID PREFOAMING TEMPERATURE.
Claim 2
Independent Claim
73 words
A METHOD OF INHIBITING THE COHESION OF HEAT-EXPANSIBLE, THERMOPLASTIC, RESINOUS PARTICLES WHEN SAID PARTICLES ARE HEATED TO A TEMPERATURE WHICH IS SUFFICIENTLY HIGH TO CAUSE SUBSTANTIAL EXPANSION THEREOF WITH RESULTANT FORMATION OF PREFOAMED PARTICLES CAPABLE OF FURTHER FOAMING UP, WHICH METHOD COMPRISES DEPOSITING ON SAID PARTICLES FROM ABOUT 30 TO ABOUT 500 PARTS PER MILLION, BASED ON THE TOTAL WEIGHT OF SAID PARTICLES, OF PERFLUOROOCTANOIC ACID PRIOR TO HEATING TO SAID PREFOAMING TEMPERATURE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |