US2988892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchoring apparatus
Assignee: California Research LLC
•
Filing: 1958-06-30
•
Granted: 1961-06-20
•
Expires: 1978-06-30
Abstract
No abstract record available.
Inventors
- 👤 Gerald F Borrmann
- 👤 Edward R Lind
- 👤 Ben K Rippe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:40
CPC Classifications
B; B63; B63B; B63B21/00; B63B21/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL75343C
Cited
NL75044C
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US825599A
Cited
US1279834A
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US1433621A
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US1786968A
Cited
DE720032C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |