US2487627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the decomposition of styphnic acid
Assignee: PPG Architectural Coatings Canada Inc
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Filing: 1946-01-31
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Granted: 1949-11-08
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Expires: 1966-01-31
Abstract
No abstract record available.
Inventors
- 👤 Aitken Roger Gordon
- 👤 Streight Harvey Richard Lyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:02
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |