Patent US3521326A successfully refreshed from Google Patents.
US3521326A
Expired / Lapsed
US
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Powder metallurgy press apparatus
Assignee: Comstock and Wescott Inc
•
Filing: 1968-04-08
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Granted: 1970-07-21
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Expires: 1988-04-08
Abstract
No abstract record available.
Inventors
- 👤 Richard E Rice
- 👤 George Warren Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:24
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/02; B30B11/027; B22; B22F; B22F3/00; B22F3/12; B22F3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US741752A
Cited
US1779534A
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US2882143A
Cited
US3052919A
Cited
US3129463A
Cited
US3277524A
Cited
US3343209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |