Patent US3682675A successfully refreshed from Google Patents.
US3682675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing fire retardance in a prefinished panel
Assignee: Welsh Corp
•
Filing: 1969-10-28
•
Granted: 1972-08-08
•
Expires: 1989-10-28
Abstract
Abstract A METHOD OF PRODUCING FIRE RETARDANCE IN A PREFINISHED PANEL. A PANEL IS IMPREGNATED IN A REGION DIRECTLY ADJACENT ITS FACE WITH A FIRE RETARDANT CHEMICAL SOLUTION AT AN ELEVATED TEMPERATURE. AFTER SUBSEQUENT CALENDERING AND DRYING, TO PRODUCE A DENSE IMPREGNATED LAYER EXTENDING OVER THE FACE OF THE PANEL, THE FINISH IS APPLIED, WITH SUCH LAYER THEN ACTING AS A FIRE RETARDANT BARRIER IN THE PANEL UNDER THE FINISH.
Inventors
- 👤 Clifford E Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:49
CPC Classifications
B; B27; B27M; B27M1/00; B27K; B27K3/00; B27K3/02; B27K3/04; B27K5/00; B27K5/001; C; C09; C09K; C09K21/00; C09K21/02; C09K21/04; D; D21; D21J; D21J1/00; D21J1/08; B27K2240/00; B27K2240/30; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |