Patent US7816A successfully refreshed from Google Patents.
US7816A
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US
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Improvement in vulcanizing india-rubber
Assignee: —
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Filing: —
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Granted: 1850-12-03
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Expires: 1867-12-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:42
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34
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) | 1853-12-02 | 1854-06-03 | 1854-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1857-12-02 | 1858-06-03 | 1858-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1861-12-02 | 1862-06-03 | 1862-12-03 | $7700.00 | Window Closed / Lapsed |