Patent US89531A successfully refreshed from Google Patents.
US89531A
Expired / Lapsed
US
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Improved composition for artificial ivory
Assignee: —
•
Filing: —
•
Granted: 1869-04-27
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Expires: 1886-04-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:13
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/14; C09K17/18; C09K17/32; C09D; C09D5/00; C09D5/34
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) | 1872-04-26 | 1872-10-26 | 1873-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1876-04-26 | 1876-10-26 | 1877-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1880-04-26 | 1880-10-26 | 1881-04-27 | $7700.00 | Window Closed / Lapsed |