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Patent US30996A successfully refreshed from Google Patents.
US30996A
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US
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Apparatus fob ventilating and warming railroad-cars
Assignee: —
•
Filing: —
•
Granted: 1860-12-18
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Expires: 1877-12-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:45
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00007; B60H1/00014
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) | 1863-12-18 | 1864-06-18 | 1864-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1867-12-18 | 1868-06-18 | 1868-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1871-12-18 | 1872-06-18 | 1872-12-18 | $7700.00 | Window Closed / Lapsed |