US2791608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of phthaloyl chlorides
Assignee: EIDP Inc
•
Filing: 1955-01-13
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Granted: 1957-05-07
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Expires: 1975-01-13
Abstract
No abstract record available.
Inventors
- 👤 David R V Golding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:17
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/58; C07C51/16; C07C51/21; C07C51/255; C07C51/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A PROCESS FOR PREPARING A PHTHALOYL CHLORIDE OF THE FORMULA
Claim 2
Dependent Claim
10 words
A PROCESS FOR PREPARING A PHTHALOYL CHLORIDE 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) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |