US2676353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning elongated porous tubes
Assignee: Individual
•
Filing: 1948-06-10
•
Granted: 1954-04-27
•
Expires: 1968-06-10
Abstract
No abstract record available.
Inventors
- 👤 Philip A Maynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:31
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/043; B08B9/0436
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1688936A
Cited
US211351A
Cited
US263349A
Cited
US351854A
Cited
NL24548C
Cited
US869585A
Cited
US1040176A
Cited
US1182028A
Cited
US1589986A
Cited
FR666652A
Cited
GB414466A
Cited
US1994616A
Cited
US2289700A
Cited
US2333713A
Cited
GB555056A
Cited
US2369649A
Cited
US2418045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |