US1524314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing more or less basic lead sulphate
Assignee: EAGLE PICHER LEAD Co
•
Filing: 1923-03-20
•
Granted: 1925-01-27
•
Expires: 1943-03-20
Abstract
No abstract record available.
Inventors
- 👤 John A Schaeffer
- 👤 John H Calbeck
- 👤 Bernard S White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:34
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-01-27 | 1928-07-28 | 1929-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-01-27 | 1932-07-28 | 1933-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-01-27 | 1936-07-28 | 1937-01-27 | $7700.00 | Window Closed / Lapsed |