Patent US3141732A successfully refreshed from Google Patents.
US3141732A
Expired / Lapsed
US
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Process for preparing metal ammonium phosphates
Assignee: WR Grace and Co
•
Filing: 1961-12-12
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Granted: 1964-07-21
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Expires: 1981-12-12
Abstract
No abstract record available.
Inventors
- 👤 John F Mccullough
- 👤 Murrell L Salutsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:20
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/45; C01B25/451; C01B25/28; C01B25/38; C01B25/40; C01B25/405
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1701265A
Cited
US1881195A
Cited
US1913539A
Cited
US2037706A
Cited
US2847476A
Cited
US2957762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |