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Patent US1255829A successfully refreshed from Google Patents.
US1255829A
Expired / Lapsed
US
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Process of making superhosphate.
Assignee: FRIEDA BLUMENBERG
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Filing: 1917-10-16
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Granted: 1918-02-05
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Expires: 1937-10-16
Abstract
No abstract record available.
Inventors
- 👤 Henry Blumeneberg Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:09
CPC Classifications
C; C05; C05F; C05F11/00; C05F11/02
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) | 1921-02-04 | 1921-08-06 | 1922-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-02-04 | 1925-08-06 | 1926-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-02-04 | 1929-08-06 | 1930-02-05 | $7700.00 | Window Closed / Lapsed |