US2875782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valves and method of making same
Assignee: Research Corp
•
Filing: 1953-12-24
•
Granted: 1959-03-03
•
Expires: 1973-12-24
Abstract
No abstract record available.
Inventors
- 👤 Lee Shih-Ying
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:47
CPC Classifications
F; F16; F16K; F16K27/00; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0401; F15B13/0402; F15B13/0406; F15B13/044; F15B9/00; F15B9/02; F15B9/08; F15B9/09; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/0655; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/86702; Y10T137/86718; Y10T137/86759
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB537715A
Cited
US2295111A
Cited
US2291563A
Cited
US2419243A
Cited
US2600702A
Cited
US2679377A
Cited
US2710628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |