Patent US3071554A successfully refreshed from Google Patents.
US3071554A
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US
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Polymeric 2, 4, 6-thionylisocyanurate and process of preparing same
Assignee: Pennwalt Corp
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Filing: 1960-04-05
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Granted: 1963-01-01
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Expires: 1980-04-05
Abstract
No abstract record available.
Inventors
- 👤 Francis L Scott
- 👤 Netsch Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:08
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/02; C08G18/022; Y; Y10; Y10S; Y10S521/00; Y10S521/902
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
43 words
A PROCESS FOR PREPARING POLYMERIC 2,4,6-THIONYLISOCYANURATE WHICH COMPRISES REACTING SILVER CYANATE AND THIONYL CHLORIDE IN AN INERT SOLVENT TO YIELD THIONYL DIISOCYANATE AND HEATING SAID THIONYL DIISOCYANATE AT A TEMPERATURE BETWEEN ABOUT 50* TO ABOUT 100*C. UNTIL A SOLID CELLULAR PRODUCT IS FORMED.
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |