Patent US2911235A successfully refreshed from Google Patents.
US2911235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clean-out fitting
Assignee: Individual
•
Filing: 1956-09-06
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Granted: 1959-11-03
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Expires: 1976-09-06
Abstract
No abstract record available.
Inventors
- 👤 Lutie J Stumbough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:28
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1305491A
Cited
US1835703A
Cited
US1108918A
Cited
US1487845A
Cited
US1600561A
Cited
US1738933A
Cited
US2451068A
Cited
GB754255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-02 | 1963-05-04 | 1963-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-02 | 1967-05-04 | 1967-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-02 | 1971-05-04 | 1971-11-03 | $7700.00 | Window Closed / Lapsed |