US3579662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Freeze protected waste trap
Assignee: LOWRY DEV CORP
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Filing: 1969-03-20
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Granted: 1971-05-25
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Expires: 1989-03-20
Abstract
Abstract A WASTE TRAP FOR WATER DRAINS HAVING A U-SHAPED CONDUIT THE LEGS OF WHICH HAVE INTERNAL TRANSVERSE CROSS SECTIONAL AREAS INCREASING PROGRESSIVELY UPWARDLY OF SAID LEGS TO THE ROUND TOP LEVEL OF WATER CONTAINED IN SAID TRAP THE WASTE TRAP BEING PROVIDED WITH AN ELECTRICAL HEATER ELEMENT AND THERMOSTATIC CONTROL.
Inventors
- 👤 Robert D Lowry
- 👤 Russell B Strout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:16
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/28
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |