Patent FR1365784A successfully refreshed from Google Patents.
Patent US1637076A successfully refreshed from Google Patents.
US1637076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety vent valve
Assignee: Individual
•
Filing: 1923-02-09
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Granted: 1927-07-26
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Expires: 1943-02-09
Abstract
No abstract record available.
Inventors
- 👤 Julius P Heil
- 👤 Borchardt Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:21
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/18; F16K17/19; F16K17/194; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0874; Y10T137/1624; Y10T137/1797; Y10T137/1804; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7842
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) | 1930-07-25 | 1931-01-24 | 1931-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-07-25 | 1935-01-24 | 1935-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-07-25 | 1939-01-24 | 1939-07-26 | $7700.00 | Window Closed / Lapsed |