Patent US2707967A successfully refreshed from Google Patents.
US2707967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain devices
Assignee: —
•
Filing: —
•
Granted: 1955-05-10
•
Expires: 1972-05-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:17
CPC Classifications
E; E03; E03B; E03B9/00; E03B9/02; E03B9/025; E03B9/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US106008A
Cited
US776482A
Cited
US886888A
Cited
US1020877A
Cited
US1056394A
Cited
US1556241A
Cited
US1885042A
Cited
US2083866A
Cited
US2533685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-09 | 1958-11-08 | 1959-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-09 | 1962-11-08 | 1963-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-09 | 1966-11-08 | 1967-05-10 | $7700.00 | Window Closed / Lapsed |