Patent US2416818A successfully refreshed from Google Patents.
US2416818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of alkaline earth
Assignee: —
•
Filing: —
•
Granted: 1947-03-04
•
Expires: 1964-03-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:02
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/62; C07C309/02; C07C309/03; C07C309/28; C07C309/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US624028A
Cited
US1303779A
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US2036469A
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US1438101A
Cited
US1706940A
Cited
US1947652A
Cited
US2286725A
Cited
US2304230A
Cited
US2361804A
Cited
US2361476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-03 | 1950-09-02 | 1951-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-03 | 1954-09-02 | 1955-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-03 | 1958-09-02 | 1959-03-04 | $7700.00 | Window Closed / Lapsed |