Patent US2494833A successfully refreshed from Google Patents.
Patent US35691A successfully refreshed from Google Patents.
US35691A
Expired / Lapsed
US
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Improved method of securing tubes in tube-sheets
Assignee: —
•
Filing: —
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Granted: 1862-06-24
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Expires: 1879-06-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:10
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373; Y10T29/49375; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/4994; Y10T29/49945
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) | 1865-06-23 | 1865-12-23 | 1866-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1869-06-23 | 1869-12-23 | 1870-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1873-06-23 | 1873-12-23 | 1874-06-24 | $7700.00 | Window Closed / Lapsed |