US3404178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted methylene diphosphonic acids and their salts
Assignee: Procter and Gamble Co
•
Filing: 1965-10-07
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Granted: 1968-10-01
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Expires: 1985-10-07
Abstract
No abstract record available.
Inventors
- 👤 Clarence Henry Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:25
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/36; C11D3/367; C11D3/368; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3839; C07F9/40; C07F9/4003; C07F9/4025; C11D3/361
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2765279A
Cited
US3214454A
Cited
GB889670A
Cited
US3093672A
Cited
US3159581A
Cited
US3256370A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |