US2170353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination valve and enclosure plate for high pressure reaction vessels
Assignee: EIDP Inc
•
Filing: 1937-11-19
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Granted: 1939-08-22
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Expires: 1957-11-19
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Stecher
- 👤 Herbert H Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:27
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; B; B01; B01J; B01J3/00; B01J3/02; F16K3/00; F16K3/22; F16K3/24; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/428; Y10T137/4287
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) | 1942-08-21 | 1943-02-20 | 1943-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-21 | 1947-02-20 | 1947-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-21 | 1951-02-20 | 1951-08-22 | $7700.00 | Window Closed / Lapsed |