Patent US3142460A successfully refreshed from Google Patents.
US3142460A
Expired / Lapsed
US
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Apparatus for flooding and draining of runways used as landing aid and safety precaution for aircraft
Assignee: Individual
•
Filing: 1962-06-01
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Granted: 1964-07-28
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Expires: 1982-06-01
Abstract
No abstract record available.
Inventors
- 👤 Donald C Langford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:08
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/02; B64F1/025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
AN APPARATUS FOR THE CONTROLLED FLOODING AND DRAINING OF AT LEAST A PORTION OF AN AIRCRAFT RUNWAY AS A LANDING AID, COMPRISING IN COMBINATION A COLLAPSIBLE BARRIER WALL DISPOSED ABOUT AT LEAST A PORTION OF SAID RUNWAY TO FORM A SUBSTANTIALLY CONTINUOUS WATER CONFINING BARRIER WITH THE SURFACE OF SAID RUNWAY PORTION, MEANS FOR ERECTING SAID BARRIER WALL ABOVE SAID RUNWAY SURFACE IN WATER CONFINING POSITION AND MEANS FOR COLLAPSING AT LEAST A PORTION OF SAID BARRIER WALL TO A POSITION SUBSTANTIALLY IN THE PLANE OF SAID RUNWAY SURFACE RELEASING WATER CONFINED WITHIN SAID WALL, MEANS TO DELIVER WATER TO SAID RUNWAY PORTION, AND MEANS TO COLLECT SAID WATER WHEN RELEASED BY SAID BARRIER WALL COLLAPSE.
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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |