US2581897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gravity operated closure with means to form an opening in a container
Assignee: Individual
•
Filing: 1949-02-05
•
Granted: 1952-01-08
•
Expires: 1969-02-05
Abstract
No abstract record available.
Inventors
- 👤 Hugh C Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:36
CPC Classifications
B; B65; B65D; B65D47/00; B65D47/04; B65D47/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US32647A
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US40251A
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GB190505129A
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US985955A
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US952683A
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US974444A
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US1048226A
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US1265607A
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US1611294A
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US1776395A
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US1716802A
Cited
US2181335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |