Patent US250635A successfully refreshed from Google Patents.
US250635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of glass building-blocks for sea-walls
Assignee: —
•
Filing: —
•
Granted: 1881-12-06
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Expires: 1898-12-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:05
CPC Classifications
E; E04; E04C; E04C1/00; E04C1/42; E02; E02B; E02B3/00; E02B3/04; E02B3/06; E04B; E04B2/00; E04B2/02; E04B2002/0202; E04B2002/0232; E04B2002/0234
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) | 1884-12-05 | 1885-06-06 | 1885-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1888-12-05 | 1889-06-06 | 1889-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1892-12-05 | 1893-06-06 | 1893-12-06 | $7700.00 | Window Closed / Lapsed |