US2724837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-contained sewerage system
Assignee: Individual
•
Filing: 1951-11-14
•
Granted: 1955-11-29
•
Expires: 1971-11-14
Abstract
No abstract record available.
Inventors
- 👤 Mcpherson Hal Weir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:10
CPC Classifications
E; E03; E03D; E03D9/00; E03D9/10; B; B61; B61D; B61D35/00; B61D35/005; B61D35/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1303358A
Cited
US1996325A
Cited
US2131711A
Cited
US2180148A
Cited
US2186371A
Cited
US2249739A
Cited
US2414964A
Cited
US2562510A
Cited
US2559704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |