US2712679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for forming argillaceous pipe
Assignee: NAT CLAY PIPE RES CORP
•
Filing: 1951-08-29
•
Granted: 1955-07-12
•
Expires: 1971-08-29
Abstract
No abstract record available.
Inventors
- 👤 John O Everhart
- 👤 Karl E Krill
- 👤 Robert E Dine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:01
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/02; B28B21/10; B28B21/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US624459A
Cited
US695748A
Cited
US870511A
Cited
US958156A
Cited
CH74909A
Cited
US1288637A
Cited
US1359543A
Cited
US1563615A
Cited
US1661414A
Cited
US1937028A
Cited
US1993760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-11 | 1959-01-10 | 1959-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-11 | 1963-01-10 | 1963-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-11 | 1967-01-10 | 1967-07-12 | $7700.00 | Window Closed / Lapsed |