US9668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in manufacturing gutta-percha and india-rubber
Assignee: —
•
Filing: —
•
Granted: 1853-04-12
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Expires: 1870-04-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:04
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/44; B29C33/52
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) | 1856-04-11 | 1856-10-11 | 1857-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1860-04-11 | 1860-10-11 | 1861-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1864-04-11 | 1864-10-11 | 1865-04-12 | $7700.00 | Window Closed / Lapsed |