Patent US631867A successfully refreshed from Google Patents.
US631867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leak-closer.
Assignee: Individual
•
Filing: 1899-06-16
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Granted: 1899-08-29
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Expires: 1919-06-16
Abstract
No abstract record available.
Inventors
- 👤 Walter D Beaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:51
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/16; F16L55/168; F16L55/17; F16L55/172
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) | 1902-08-29 | 1903-02-28 | 1903-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1906-08-29 | 1907-02-28 | 1907-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1910-08-29 | 1911-02-28 | 1911-08-30 | $7700.00 | Window Closed / Lapsed |