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US2815971A
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US
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Locking devices
Assignee: HERCULOX LOOSE LEAF CORP
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Filing: 1955-03-02
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Granted: 1957-12-10
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Expires: 1975-03-02
Abstract
No abstract record available.
Inventors
- 👤 James P Guinane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:29
CPC Classifications
F; F16; F16B; F16B7/00; F16B7/04; F16B7/0406; F16B21/00; F16B21/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US700412A
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US1130716A
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US1246329A
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US1299745A
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US1285939A
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US1632249A
Cited
US1986594A
Cited
US2515807A
Cited
US2373083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |