US3141235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powdered tantalum articles
Assignee: Individual
•
Filing: 1963-04-11
•
Granted: 1964-07-21
•
Expires: 1983-04-11
Abstract
No abstract record available.
Inventors
- 👤 William H Lenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:58
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/04; C22C1/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A DUCTILE, WORKABLE, SINTERED METAL SELECTED FROM THE CLASS CONSISTING OF TANTALUM, COLUMBIUM, HAFNIUM, TITANIUM AND VANADIUM CONTAINING AT LEAST ONE WEIGHT PERCENT YTTRIUM, THE BALANCE BEING ESSENTIALLY AT LEAST ONE OF THE SAID METALS.
Claim 2
Dependent Claim
35 words
A DUCTILE, WORKABLE, SINTERED METAL SELECTED FROM THE CLASS CONSISTING OF TANTALUM, COLUMBIUM, HAFNIUM, TITANIUM AND VANADIUM CONTAINING AT LEAST ONE WEIGHT PERCENT YTTRIUM, THE BALANCE BEING ESSENTIALLY AT LEAST ONE OF THE SAID METALS.
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |