US2661019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic venting drum cap and valve assembly
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1950-04-27
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Granted: 1953-12-01
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Expires: 1970-04-27
Abstract
No abstract record available.
Inventors
- 👤 Snyder Jacob Rush
- 👤 Frank J Schenkelberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:28
CPC Classifications
B; B65; B65D; B65D47/00; B65D47/04; B65D47/20; B65D47/24; B65D47/248; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7886; Y10T137/8593; Y10T137/86292; Y10T137/86324; Y10T137/86332; Y10T137/87153; Y10T137/8807
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US278597A
Cited
US1034897A
Cited
US1579140A
Cited
DE505438C
Cited
US2401391A
Cited
GB555716A
Cited
US2431457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |