Patent US4590086A successfully refreshed from Google Patents.
Patent US1983618A successfully refreshed from Google Patents.
US1983618A
Expired / Lapsed
US
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Forging apparatus
Assignee: PITTSBURGH PIPE AND COUPLING CO
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Filing: 1932-11-04
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Granted: 1934-12-11
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Expires: 1952-11-04
Abstract
No abstract record available.
Inventors
- 👤 Lamond John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:35
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/14; B21K1/16; B21J; B21J13/00; B21J13/02; B21J13/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-12-10 | 1938-06-11 | 1938-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-12-10 | 1942-06-11 | 1942-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-12-10 | 1946-06-11 | 1946-12-11 | $7700.00 | Window Closed / Lapsed |