Patent US138199A successfully refreshed from Google Patents.
US138199A
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US
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Improvement in injectors for steam-generators
Assignee: —
•
Filing: —
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Granted: 1873-04-22
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Expires: 1890-04-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:54
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/44; F04F5/46; F04F5/461
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) | 1876-04-21 | 1876-10-21 | 1877-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1880-04-21 | 1880-10-21 | 1881-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1884-04-21 | 1884-10-21 | 1885-04-22 | $7700.00 | Window Closed / Lapsed |