US3658737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of coal in electrodepositable compositions
Assignee: PPG Industries Inc
•
Filing: 1969-06-23
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Granted: 1972-04-25
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Expires: 1989-06-23
Abstract
Abstract THIS INVENTION RELATES TO NOVEL PIGMENTED ELECTRODEPOSITABLE COMPOSITIONS. MORE PARTICULARLY, THIS INVENTION RELATES TO THE USE OF ANTHRACITE COAL IN PIGMENTARY FORM TO PRODUCE BLACK, GREY OR DARK-COLORED ELECTRODEPOSITABLE COMPOSITIONS.
Inventors
- 👤 James Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:26
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/448; Y; Y10; Y10S; Y10S524/00; Y10S524/901
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |