US3089752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation and recovery of ammonium bifluoride
Assignee: American Agricultural Chemical Co
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Filing: 1960-12-27
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Granted: 1963-05-14
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Expires: 1980-12-27
Abstract
No abstract record available.
Inventors
- 👤 Clark George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:45
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/16; C01C1/162
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
52 words
A METHOD FOR THE MANUFACTURE OF AMMONIUM BIFLUORIDE WHICH COMPRISES REACTING AMMONIUM FLUORIDE DISSLOVED IN AN AQUEOUS SOLUTION WITH AN ORGANIC AMMONIA COMPLEXING AGENT SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE, ACETALDEHYDE AND ACRYLONITRILE AT A TEMPERATURE NOT HIGHER THAN ABOUT 100*C. TO YIELD AMMONIUM BIFLURORIDE AS A PRODUCT OF THE REACTION
References Cited (Backward Citations)
US1642788A
Cited
GB286730A
Cited
US2288727A
Cited
US2816818A
Cited
US2945745A
Cited
US3021194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |