Patent US221138A successfully refreshed from Google Patents.
US221138A
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US
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Improvement in methods of cleaning glass-molds
Assignee: —
•
Filing: —
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Granted: 1879-10-28
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Expires: 1896-10-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:53
CPC Classifications
B; B08; B08B; B08B7/00; B08B7/0014; C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3765; Y; Y10; Y10T; Y10T29/00; Y10T29/45; Y10T29/4594
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) | 1882-10-27 | 1883-04-28 | 1883-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1886-10-27 | 1887-04-28 | 1887-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1890-10-27 | 1891-04-28 | 1891-10-28 | $7700.00 | Window Closed / Lapsed |