US2597370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cement lining for metal pipe
Assignee: United States Steel Corp
•
Filing: 1948-04-02
•
Granted: 1952-05-20
•
Expires: 1968-04-02
Abstract
No abstract record available.
Inventors
- 👤 Arnold L Peckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:51
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
41 words
A LOW-SOLUBLE CEMENT FOR LINING STEEL PIPE HAVING A COMPOSITION CONSISTING OF 48.00% TO 49.50% BY WEIGHT BLAST FURNACE SLAG, 33.00% TO 34.00% BY WEIGHT PORTLAND CEMENT, 16.00% TO 17.00% BY WEIGHT RIVER SAND, AND 1.40% TO 1.70% BY WEIGHT GYPSUM.
References Cited (Backward Citations)
US85713A
Cited
US770557A
Cited
GB190612621A
Cited
US1020124A
Cited
GB203937A
Cited
US1748839A
Cited
US1916157A
Cited
GB500203A
Cited
US2308307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |