US2984894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite material
Assignee: Engelhard Industries Inc
•
Filing: 1956-11-30
•
Granted: 1961-05-23
•
Expires: 1976-11-30
Abstract
No abstract record available.
Inventors
- 👤 James S Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:09
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/018; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12069; Y10T428/12097; Y10T428/12486; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12875
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A COMPOSITE MATERIAL COMPRISING FIRST AND SECOND SOLID METAL OUTER LAYERS EACH CONSISTING OF AT LEAST ONE PLATINUM GROUP METAL WITH A CORE BONDED THEREBETWEEN, THE CORE CONSISTING OF COMPACTED AND SINTERED PLATINUM GROUP METAL POWDER, WHEREBY THE COMPOSITE MATERIAL RE-
Claim 2
Dependent Claim
41 words
A COMPOSITE MATERIAL COMPRISING FIRST AND SECOND SOLID METAL OUTER LAYERS EACH CONSISTING OF AT LEAST ONE PLATINUM GROUP METAL WITH A CORE BONDED THEREBETWEEN, THE CORE CONSISTING OF COMPACTED AND SINTERED PLATINUM GROUP METAL POWDER, WHEREBY THE COMPOSITE MATERIAL RE-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |