US2747231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of pressing powder compacts
Assignee: Duracell Inc USA
•
Filing: 1953-01-26
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Granted: 1956-05-29
•
Expires: 1973-01-26
Abstract
No abstract record available.
Inventors
- 👤 Herbert P Reinhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:25
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/02; Y; Y10; Y10S; Y10S264/00; Y10S264/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE METHOD OF PRESSING FROM METALLIC POWDER A COHERENT BODY WHICH COMPRISES INTRODUCING A MEASURED AMOUNT OF THE POWDER INTO A DIE, APPLYING A PREFORM PUNCH OF PREDETERMINED CONFIGURATION AGAINST THE TOP SURFACE OF SAID POWDER IN THE SUBSTANTIAL ABSENCE OF PRESSURE, VIBRATING SAID DIE TO CAUSE THE POWDER TO FLOW AND TO ASSUME THE SHAPE OF THE CAVITY DEFINED BY SAID DIE AND PUNCH, REPLACING SAID PREFORM PUNCH WITH A PRESSING
Claim 2
Independent Claim
72 words
THE METHOD OF PRESSING FROM METALLIC POWDER A COHERENT BODY WHICH COMPRISES INTRODUCING A MEASURED AMOUNT OF THE POWDER INTO A DIE, APPLYING A PREFORM PUNCH OF PREDETERMINED CONFIGURATION AGAINST THE TOP SURFACE OF SAID POWDER IN THE SUBSTANTIAL ABSENCE OF PRESSURE, VIBRATING SAID DIE TO CAUSE THE POWDER TO FLOW AND TO ASSUME THE SHAPE OF THE CAVITY DEFINED BY SAID DIE AND PUNCH, REPLACING SAID PREFORM PUNCH WITH A PRESSING
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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) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |