Patent US4766548A successfully refreshed from Google Patents.
Patent US2601339A successfully refreshed from Google Patents.
US2601339A
Expired / Lapsed
US
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Drum cap and spigot valve assembly
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1948-03-01
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Granted: 1952-06-24
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Expires: 1968-03-01
Abstract
No abstract record available.
Inventors
- 👤 Snyder Jacob Rush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:07
CPC Classifications
B; B67; B67D; B67D1/00; B67D1/08; B67D1/0829; B67D1/0831; B67D1/0835; F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/20; F16K1/2028; F16K1/2042; F16K1/2057; F16K1/2071; F16L; F16L37/00; F16L37/28; F16L37/38; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/612; Y10T137/613; Y10T137/8593; Y10T137/87917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189619500A
Cited
US1334819A
Cited
FR562778A
Cited
US1663952A
Cited
GB438467A
Cited
US2267754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-24 | 1955-12-24 | 1956-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-24 | 1959-12-24 | 1960-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-24 | 1963-12-24 | 1964-06-24 | $7700.00 | Window Closed / Lapsed |