US2861880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum powder
Assignee: Mcintyre Res Foundation
•
Filing: 1957-06-07
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Granted: 1958-11-25
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Expires: 1977-06-07
Abstract
No abstract record available.
Inventors
- 👤 John W G Hannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:38
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/007; A61K9/0073; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A POWDER FOR USE IN THE PREVENTION OF SILICOSIS COMPRISING A STABLE ALUMINUM OXIDE POWDER FORMED FROM SUBSTANTIALLY PURE METALLIC ALUMINUM AND HAVING A PARTICLE SIZE SUCH THAT SUBSTANTIALLY ALL OF THE PARTICLES ARE 1.2 MICRONS OR LESS THE MAJORITY OF THE PARTICLES ARE 0.4 MICRON OR LESS, SAID PARTICLES CONTAINING 12 TO 15% PURE METALLIC ALUMINUM.
Claim 2
Dependent Claim
57 words
A POWDER FOR USE IN THE PREVENTION OF SILICOSIS COMPRISING A STABLE ALUMINUM OXIDE POWDER FORMED FROM SUBSTANTIALLY PURE METALLIC ALUMINUM AND HAVING A PARTICLE SIZE SUCH THAT SUBSTANTIALLY ALL OF THE PARTICLES ARE 1.2 MICRONS OR LESS THE MAJORITY OF THE PARTICLES ARE 0.4 MICRON OR LESS, SAID PARTICLES CONTAINING 12 TO 15% PURE METALLIC ALUMINUM.
References Cited (Backward Citations)
GB625364A
Cited
US2678879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |