Patent US3765690A successfully refreshed from Google Patents.
US877003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety-valve for gas-conduits.
Assignee: Individual
•
Filing: 1907-10-07
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Granted: 1908-01-21
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Expires: 1927-10-07
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:49
CPC Classifications
F; F16; F16K; F16K17/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7731; Y10T137/7732; Y10T137/7781; Y10T137/7782; Y10T137/7835; Y10T137/7836
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) | 1911-01-20 | 1911-07-22 | 1912-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-01-20 | 1915-07-22 | 1916-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-01-20 | 1919-07-22 | 1920-01-21 | $7700.00 | Window Closed / Lapsed |