US2957235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of joining powder metal parts
Assignee: Purolator Products Inc
•
Filing: 1957-03-12
•
Granted: 1960-10-25
•
Expires: 1977-03-12
Abstract
No abstract record available.
Inventors
- 👤 Morris A Steinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:56
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/06; B22F7/062; Y; Y10; Y10S; Y10S29/00; Y10S29/031; Y10S55/00; Y10S55/05; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49604; Y10T29/4981; Y10T29/49812; Y10T29/49826
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1200992A
Cited
US1757846A
Cited
GB417661A
Cited
GB558124A
Cited
US2459513A
Cited
US2679913A
Cited
US2725265A
Cited
US2676435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |