US3307925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protected columbium or tantalum article
Assignee: EIDP Inc
•
Filing: 1965-09-07
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Granted: 1967-03-07
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Expires: 1985-09-07
Abstract
No abstract record available.
Inventors
- 👤 Howard W Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:00
CPC Classifications
C; C23; C23C; C23C24/00; C23C10/00; C23C10/28; C23C10/34; C23C10/36; C23C10/44; C23C16/00; C23C16/02; C23C16/0272; C23C16/0281; C23C16/22; C23C16/30; C23C16/42; C23C28/00; C23C28/30; C23C28/32; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/936; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12674; Y10T428/12771; Y10T428/12806; Y10T428/12812; Y10T428/12819
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A COATED REFRACTORY-METAL-BASE ARTICLE COMPRISING A REFRACTORY-METAL-BASE ALLOY SELECTED FROM THE GROUP CONSISTING OF COLUMBIUM-BASE AND TANTALUM-BASE ALLOYS, UPON THE SURFACE OF WHICH ARTICLE THERE IS A FIRMLY BONDED MULTILAYER COATING COMPRISING A FIRST LAYER OF TITANIUM AND A SECOND LAYER OF A DISILICIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF TUNGSTEN AND MOLYBDENUM.
Claim 2
Dependent Claim
56 words
A COATED REFRACTORY-METAL-BASE ARTICLE COMPRISING A REFRACTORY-METAL-BASE ALLOY SELECTED FROM THE GROUP CONSISTING OF COLUMBIUM-BASE AND TANTALUM-BASE ALLOYS, UPON THE SURFACE OF WHICH ARTICLE THERE IS A FIRMLY BONDED MULTILAYER COATING COMPRISING A FIRST LAYER OF TITANIUM AND A SECOND LAYER OF A DISILICIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF TUNGSTEN AND MOLYBDENUM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |