US3567613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for flameproofing combustible materials
Assignee: WR Grace and Co
•
Filing: 1968-05-10
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Granted: 1971-03-02
•
Expires: 1988-05-10
Abstract
Abstract A PROCESS FOR FLAMESPROOFING COMBUSTIBLE MATERIALS BY ELECTRODEPOSITING VERMICULITE FROM AN AQUEOUS SOLUTION OF AN ALKALI METAL SALT ONTO SAID MATERIALS.
Inventors
- 👤 John W Kraus
- 👤 Jose E Herrera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:00
CPC Classifications
C; C25; C25D; C25D13/00; C25D13/02
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |