Patent FR797933A successfully refreshed from Google Patents.
Patent US2576012A successfully refreshed from Google Patents.
US2576012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sleeve joint for concrete tubes
Assignee: Lock Joint Pipe Co
•
Filing: 1950-04-04
•
Granted: 1951-11-20
•
Expires: 1970-04-04
Abstract
No abstract record available.
Inventors
- 👤 Gurck Arnoldus Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:14
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/0027
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1345829A
Cited
US1396135A
Cited
US1401105A
Cited
US1652418A
Cited
US1739472A
Cited
US1938229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |