Patent US2177265A successfully refreshed from Google Patents.
US2177265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for reducing the pressure of high pressure systems
Assignee: Chemische Fabrik Von Heyden AG
•
Filing: 1936-02-28
•
Granted: 1939-10-24
•
Expires: 1956-02-28
Abstract
No abstract record available.
Inventors
- 👤 Rath Curt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:21
CPC Classifications
F; F16; F16K; F16K29/00; F16K29/02; G; G05; G05D; G05D16/00; G05D16/14; G05D16/18; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/428; Y10T137/4322; Y10T137/598; Y10T137/599; Y10T137/6198; Y10T137/6253
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1942-10-23 | 1943-04-24 | 1943-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-10-23 | 1947-04-24 | 1947-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-10-23 | 1951-04-24 | 1951-10-24 | $7700.00 | Window Closed / Lapsed |