US2591067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical process for production of leaded ammonium chloride crystals
Assignee: EIDP Inc
•
Filing: 1948-03-16
•
Granted: 1952-04-01
•
Expires: 1968-03-16
Abstract
No abstract record available.
Inventors
- 👤 Carl V Herrmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:08
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/16; C01C1/164; B; B01; B01D; B01D9/00; B01D9/0018; B01D9/0022; B01D9/0031; B01D9/0036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1879445A
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US2042661A
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US2164112A
Cited
US1936811A
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US2133513A
Cited
US2409790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |