US3389990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manganese nitride
Assignee: Pickands Mather and Co
•
Filing: 1965-05-17
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Granted: 1968-06-25
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Expires: 1985-05-17
Abstract
No abstract record available.
Inventors
- 👤 William W Gullett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:44
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/0047; C22C32/0068; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/622; C04B35/64; C04B35/65
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
PROCESS OF PRODUCING A NITRIDGED SINTER OF A MANGANESE-CONTAINING STARTING MATERIAL SELECTED FROM THE GROUP CONSISTING OF MANGANESE AND MANGANESE ALLOYS, WHICH COMPRISES COARSELY CRUSHING AND THEN COMMINUTING IN AN IMPACT-TYPE MILL SAID STARTING MATERIAL TO THE PRODUCTION OF A COMMINUTED MATERIAL CONSISTING OF PARTICLES OF NONSILVERY SHAPE VARYING IN SIZE BETWEEN 6 MESH AND 325 MESH AND HAVING SUBSTANTIALLY THE FOLLOWING SIZE DISTRIBUTION:
Claim 2
Dependent Claim
64 words
PROCESS OF PRODUCING A NITRIDGED SINTER OF A MANGANESE-CONTAINING STARTING MATERIAL SELECTED FROM THE GROUP CONSISTING OF MANGANESE AND MANGANESE ALLOYS, WHICH COMPRISES COARSELY CRUSHING AND THEN COMMINUTING IN AN IMPACT-TYPE MILL SAID STARTING MATERIAL TO THE PRODUCTION OF A COMMINUTED MATERIAL CONSISTING OF PARTICLES OF NONSILVERY SHAPE VARYING IN SIZE BETWEEN 6 MESH AND 325 MESH AND HAVING SUBSTANTIALLY THE FOLLOWING SIZE DISTRIBUTION:
References Cited (Backward Citations)
DE938486C
Cited
US2860080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |