US3559408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring development system
Assignee: Individual
•
Filing: 1968-09-26
•
Granted: 1971-02-02
•
Expires: 1988-09-26
Abstract
Abstract THE SYSTEM CONTEMPLATES THE PROVISION OF A PRECAST WATER COLLECTION BOX OR RESERVOIR COMMUNICATED WITH COLLECTOR DRAIN TILE IN A SPRING OR SEEP AREA THROUGH AN INLET PIPE, AND COMMUNICATED WITH A TROUGH OR HOLDING TANK THROUGH AN OUTFLOW PIPE THE BOX INCLUDES AN OVERFLOW OUTLET PIPE WITH THE VARIOUS PIPES COMMUNICATING WITH THE PRECAST BOX AT PREDETERMINED POINTS ABOVE THE BOTTOM THEREOF, THE INLET PIPE AND THE OVERFLOW OUTLET PIPE BEING RECEIVED AND MORTARED WITHIN TAPERED PRECAST HOLES FOR SIMPLIFYING THE ASSEMBLY.
Inventors
- 👤 La Mar M Earnhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:16
CPC Classifications
E; E03; E03B; E03B3/00; E03B3/06; Y; Y10; Y10T; Y10T137/00; Y10T137/402
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |