Patent US3556837A successfully refreshed from Google Patents.
US3556837A
Expired / Lapsed
US
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Composite and method of making same
Assignee: Gulf Energy and Environmental Systems Inc
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Filing: 1967-11-22
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Granted: 1971-01-19
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Expires: 1987-11-22
Abstract
Abstract HIGH STRENGTH COMPOSITE MADE OF A PLURALITY OF PAIRS OF ALTERNATING LAYERS EACH OF WHICH IS MADE BY VAPOR DEPOSITION. THE MATERIAL OF ONE GROUP OF LAYERS IS DUCTILE, RELATO THE OTHER. THE COMPOSITE MAY HAVE A VERY HIGH TENSILE STRENGTH OR MODULUS OF ELASTICITY BY SO CHOOSING THE OTHER MATERIAL. THE LAYERS ARE USUALLY BETWEEN ABOUT 100 A. AND 10 MICRONS THICK AND MAY HAVE A VERY THIN LAYER OF A THIRD MATERIAL DEPOSITED THEREBETWEEN TO IMPROVE BONDING.
Inventors
- 👤 Robert H Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:49
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/0005; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12444; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12819; Y10T428/12861; Y10T428/12903; Y10T428/12986; Y10T428/26; Y10T428/261; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31678
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |