US2945865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phthalides
Assignee: Dow Chemical Co
•
Filing: 1958-08-29
•
Granted: 1960-07-19
•
Expires: 1978-08-29
Abstract
No abstract record available.
Inventors
- 👤 Donald D Wheeler
- 👤 David C Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:19
CPC Classifications
C; C07; C07C; C07C229/00; C07C229/38; C07D; C07D307/00; C07D307/77; C07D307/87; C07D307/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A PHTHALIDE HAVING THE FORMULA
Claim 2
Dependent Claim
5 words
A PHTHALIDE HAVING THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |