US3702261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of providing substrates with stiff reinforcing material
Assignee: National Research Corp
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Filing: 1969-01-22
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Granted: 1972-11-07
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Expires: 1989-01-22
Abstract
Abstract STRUCTURAL COMPOSITES UTILIZING HIGH STIFFNESS REINFORCEMENT ARE MADE UP OF LAMINATED ELEMENTS. EACH BASIC LAMINATED ELEMENT IS MADE BY VACUUM COATING OPPOSED FACES OF A SUBSTRATE IN ALTERNATION WITH SEVERAL LAYERS OF COATING APPLIED TO EACH FACE TO ACHIEVE TOTAL COATING THICKNESS. THE RESULTANT PRODUCT IS AN IMPROVED LAMINATE OF FLAT, HIGH STRENGTH REINFORCING LAYERS OF UNIFORM THICKNESS.
Inventors
- 👤 Frank Feakes
- 👤 Gabriel E Padawer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:35
CPC Classifications
C; C22; C22C; C22C47/00; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
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) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |