Patent US2993067A successfully refreshed from Google Patents.
US2993067A
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Phosphonates, acid derivatives thereof and their salts
Assignee: Pharmacia and Upjohn Co
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Filing: 1959-05-29
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Granted: 1961-07-18
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Expires: 1979-05-29
Abstract
No abstract record available.
Inventors
- 👤 Barney J Magerlein
- 👤 Kagan Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:50
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A COMPOUND SELECTED FROM THE CLASS CONSISTING OF (A) COMPOUNDS HAVING THE FORMULA:
Claim 2
Dependent Claim
13 words
A COMPOUND SELECTED FROM THE CLASS CONSISTING OF (A) COMPOUNDS HAVING THE FORMULA:
References Cited (Backward Citations)
US2328358A
Cited
US2759961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |