US2722402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve sealing device
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1949-08-05
•
Granted: 1955-11-01
•
Expires: 1969-08-05
Abstract
No abstract record available.
Inventors
- 👤 Robert R Crookston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:12
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/02; F16K41/04; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US744643A
Cited
US1517593A
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US1721114A
Cited
US2011674A
Cited
GB502554A
Cited
US2360733A
Cited
US2481482A
Cited
US2574851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |