US2806638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Release valve for pressurized containers
Assignee: Z AND W MACHINE PRODUCTS Inc
•
Filing: 1954-08-12
•
Granted: 1957-09-17
•
Expires: 1974-08-12
Abstract
No abstract record available.
Inventors
- 👤 Frank A Ziherl
- 👤 Arthur S Kish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:36
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/16; B65D83/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735590A
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US2628062A
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US2675204A
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US2587040A
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US2658714A
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US2661019A
Cited
US2729367A
Cited
US2685989A
Cited
US2558272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |