US3725117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromium oxide coating for siliceous articles
Assignee: BP Chemicals Hitco Inc
•
Filing: 1970-09-03
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Granted: 1973-04-03
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Expires: 1990-09-03
Abstract
Abstract AN IMPROVED TREATMENT FOR PROVIDING A CHROMIUM OXIDE COATING ON SILICEOUS ARTICLES, PARTICULARLY, HIGH SILICA CONTENT FIBERS, AND ARTICLES COMPRISED THEREOF, BY APPLYING A SOLUTION OF A WERNER COMPLEX OF AN ORGANIC DICARBOXYLIC ACID AND A DICHROMATE, PARTICULARLY AMMONIUM DIOXALATODIAQUOCHROMATE, TO THE ARTICLE AND HEATING THE ARTICLE TO PYROLITICALLY DECOMPOSE THE COMPLEX TO FORM SAID COATING.
Inventors
- 👤 B Caruso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:19
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/38; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2926; Y10T442/2992
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |