US2987856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocking chain wall
Assignee: Individual
•
Filing: 1958-05-21
•
Granted: 1961-06-13
•
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 10:47
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04; F27D1/18; F27D1/1858; F27D2001/1875
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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 |