Patent US27251A successfully refreshed from Google Patents.
US27251A
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Improvement in compositions formed of caoutchouc
Assignee: —
•
Filing: —
•
Granted: 1860-02-21
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Expires: 1877-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:37
CPC Classifications
C; C08; C08L; C08L3/00; C08L3/02
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) | 1863-02-20 | 1863-08-22 | 1864-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1867-02-20 | 1867-08-22 | 1868-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1871-02-20 | 1871-08-22 | 1872-02-21 | $7700.00 | Window Closed / Lapsed |