Patent US1286089A successfully refreshed from Google Patents.
US1286089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing hollow objects of compressed metallic powder.
Assignee: PFANSTIEHL COMPANY Inc
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Filing: 1916-11-04
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Granted: 1918-11-26
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Expires: 1936-11-04
Abstract
No abstract record available.
Inventors
- 👤 Carl A Pfanstiehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:13
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/24; B22F2999/00
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) | 1921-11-25 | 1922-05-27 | 1922-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-11-25 | 1926-05-27 | 1926-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-11-25 | 1930-05-27 | 1930-11-26 | $7700.00 | Window Closed / Lapsed |