US3469405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mine water barrier
Assignee: LAYNE NEW YORK CO Inc
•
Filing: 1968-08-14
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Granted: 1969-09-30
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Expires: 1988-08-14
Abstract
No abstract record available.
Inventors
- 👤 Richard H Reinhold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:30
CPC Classifications
E; E02; E02D; E02D19/00; E02D19/06; E02D19/12; E02D19/16; E02D5/00; E02D5/18; E21; E21F; E21F17/00; E21F17/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US900683A
Cited
US1004419A
Cited
US2179077A
Cited
US3340693A
Cited
US3300984A
Cited
US3421587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |