Patent US3496222A successfully refreshed from Google Patents.
US3496222A
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US
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Diacetylated cyclic dimer of ethane-1-hydroxy - 1,1 - diphosphonic acid and salts thereof
Assignee: Procter and Gamble Co
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Filing: 1967-12-28
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Granted: 1970-02-17
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Expires: 1987-12-28
Abstract
No abstract record available.
Inventors
- 👤 Oscar T Quimby
- 👤 James B Prentice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:40
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3895; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C11; C11D; C11D3/00; C11D3/16; C11D3/36; C11D3/361
Claims Analysis
Total Claims: 0
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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) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |