Patent US3473786A successfully refreshed from Google Patents.
US3473786A
Expired / Lapsed
US
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Fencing for controlling accumulation and drifting of snow,sand or other heavier-than-air particles suspended in air currents
Assignee: ROBERT W LUEBKE
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Filing: 1967-06-30
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Granted: 1969-10-21
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Expires: 1987-06-30
Abstract
No abstract record available.
Inventors
- 👤 Robert W Luebke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:53
CPC Classifications
E; E01; E01F; E01F7/00; E01F7/02; E04; E04H; E04H17/00; E04H17/14; E04H17/1413; E04H17/1445
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |