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US3494787A
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Encapsulated perphthalic acid compositions and method of making same
Assignee: PPG Industries Inc
•
Filing: 1966-12-19
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Granted: 1970-02-10
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Expires: 1986-12-19
Abstract
No abstract record available.
Inventors
- 👤 Jan P Lund
- 👤 Donald R Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:31
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/0039; C11D3/00; C11D3/39; C11D3/3945
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2287064A
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US2347434A
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US2423451A
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US2448252A
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BE560389A
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US3202731A
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US3154494A
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US3231605A
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US3241246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |