US3783068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming fusible reinforced polymer films and resulting composite structure
Assignee: Northrop Grumman Corp
•
Filing: 1970-03-12
•
Granted: 1974-01-01
•
Expires: 1990-03-12
Abstract
Abstract A METHOD OF FORMING POLYAMIDE FILMS REINFORCED WITH REINFORCING FILAMENTS, COMPRISING PROVIDING A THIN FUSIBLE, NON-POROUS FILM OF THE POLYAMIDE ON A FILAMENT WINDING DRUM, WRAPPING REINFORCING FILAMENTS THEREON, COATING THE FILAMENTS WITH ADDITIONAL POLYAMIDE RESIN, STAGING THE MATERIAL TO A TACK-FREE CONDITION, THEN REMOVING IT FROM THE WINDING DRUM AND APPLYING HEAT TO REMOVE THE VOLATILES FROM THE FILM. STACKED LAYERS OF THE FILM CAM THEN BE SUBJECTED TO TEMPERATURES AND PRESSURES SUFFICIENT TO FUSE AND CURE THE LAYERS INTO AN INTEGRATED STRUCTURE.
Inventors
- 👤 G Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:17
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/31504; Y10T428/31725; Y10T428/31765
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |