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US2834804A
Expired / Lapsed
US
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Dicarboxyphenylphosphonic acid
Assignee: Wyeth Holdings LLC
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Filing: 1956-07-10
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Granted: 1958-05-13
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Expires: 1976-07-10
Abstract
No abstract record available.
Inventors
- 👤 Hans Z Lecher
- 👤 Ruth A Greenwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:10
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3834
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
10 words
AS A NEW PRODUCT A MONO-POTASSIUM SALT OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |