US77465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in cement watee-hees
Assignee: —
•
Filing: —
•
Granted: 1868-05-05
•
Expires: 1885-05-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:30
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/48; B29C65/52; B29C65/54; F; F16; F16L; F16L9/00; F16L9/08
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) | 1871-05-05 | 1871-11-04 | 1872-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1875-05-05 | 1875-11-04 | 1876-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1879-05-05 | 1879-11-04 | 1880-05-05 | $7700.00 | Window Closed / Lapsed |