Patent US2987872A successfully refreshed from Google Patents.
US2987872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detachable linkage having coil springs with integral link-connecting arms
Assignee: Individual
•
Filing: 1957-08-12
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Granted: 1961-06-13
•
Expires: 1977-08-12
Abstract
No abstract record available.
Inventors
- 👤 Brunet Louis
- 👤 Chappet Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:54
CPC Classifications
A; A44; A44C; A44C5/00; A44C5/02; A44C5/04; A44C5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US914533A
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US1901345A
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US2055541A
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CH251199A
Cited
US2540522A
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US2574567A
Cited
US2689450A
Cited
DE932867C
Cited
FR1119130A
Cited
US2853887A
Cited
US2799135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |