Patent US139274A successfully refreshed from Google Patents.
US139274A
Expired / Lapsed
US
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Improvement in processes of making artificial stone
Assignee: —
•
Filing: —
•
Granted: 1873-05-27
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Expires: 1890-05-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:32
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/63; H10P14/6302; H10P14/6304; H10P14/6306; H10P14/6308; H10P14/6309; Y; Y10; Y10S; Y10S264/00; Y10S264/43
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) | 1876-05-26 | 1876-11-25 | 1877-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1880-05-26 | 1880-11-25 | 1881-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1884-05-26 | 1884-11-25 | 1885-05-27 | $7700.00 | Window Closed / Lapsed |