Patent US3770816A successfully refreshed from Google Patents.
US3770816A
Expired / Lapsed
US
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Diperisophthalic acid compositions
Assignee: PPG Industries Inc
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Filing: 1969-07-23
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Granted: 1973-11-06
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Expires: 1989-07-23
Abstract
Abstract DIPERISOPHTHALIC ACID IS FORMULATED WITH INERT HYDRATED SALTS WHICH RETAIN WATER OF HYDRATION AT TEMPERATURES UP TO 30*C. BUT GIVE UP CONSIDERABLE WATER OF HYDRATION BELOW THE NORMAL DECOMPOSITION TEMPERATURE OF THE ACID SUCH AS BELOW 130*C. TO DAMPEN THE DETONABILITY OF THE DIPERISOPHTHALIC ACID.
Inventors
- 👤 D Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:22
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3945
Claims Analysis
Total Claims: 0
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |