US2075212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of phosphoric acid
Assignee: General Chemical Corp
•
Filing: 1933-03-17
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Granted: 1937-03-30
•
Expires: 1953-03-17
Abstract
No abstract record available.
Inventors
- 👤 Charles L Levermore
- 👤 Robert E Vivian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:31
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/20; C01B25/12; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
Total Claims: 0
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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) | 1940-03-29 | 1940-09-28 | 1941-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-29 | 1944-09-28 | 1945-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-29 | 1948-09-28 | 1949-03-30 | $7700.00 | Window Closed / Lapsed |