Patent US2597639A successfully refreshed from Google Patents.
US2597639A
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Combination hinge and latch for playpens
Assignee: WILLIAM H HURLIN
•
Filing: 1950-03-09
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Granted: 1952-05-20
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Expires: 1970-03-09
Abstract
No abstract record available.
Inventors
- 👤 William A Hildreth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:50
CPC Classifications
A; A47; A47D; A47D13/00; A47D13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US574397A
Cited
US1226324A
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US1265412A
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US1248854A
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US1479628A
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US1701670A
Cited
FR758918A
Cited
US2064839A
Cited
US2441318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |