Patent US2987856A successfully refreshed from Google Patents.
US2987856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocking chain wall
Assignee: Individual
•
Filing: 1958-05-21
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Granted: 1961-06-13
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Expires: 1978-05-21
Abstract
No abstract record available.
Inventors
- 👤 Levi S Longenecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:34
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04; F27D1/18; F27D1/1858; F27D2001/1875
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1443487A
Cited
FR629617A
Cited
US1978077A
Cited
GB537134A
Cited
US2441890A
Cited
US2585552A
Cited
US2699740A
Cited
US2674871A
Cited
US2737268A
Cited
GB711449A
Cited
US2870624A
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 |