US3428729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled release formulation
Assignee: WILLIAM V DAKIN
•
Filing: 1966-12-20
•
Granted: 1969-02-18
•
Expires: 1986-12-20
Abstract
No abstract record available.
Inventors
- 👤 William R Anderson
- 👤 Anthony Pescetti
- 👤 William V Dakin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:31
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0019; A61K9/0024; A61K51/00; A61K51/12; A61K9/20; A61K9/2004; A61K9/2013; A61K2121/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2937969A
Cited
US3018217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |