Patent US1122938A successfully refreshed from Google Patents.
Patent US2547495A successfully refreshed from Google Patents.
US2547495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of bis-phthalimidoesters
Assignee: Rohm and Haas Co
•
Filing: 1949-12-28
•
Granted: 1951-04-03
•
Expires: 1969-12-28
Abstract
No abstract record available.
Inventors
- 👤 Stanley P Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:17
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C07D221/00; C07D221/02; C07D221/04; C07D221/06; C07D221/14; C07D221/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
9 words
AS NEW CHEMICAL COMPOUNDS, BIS-PHTHALIMIDO-ESTERS OF THE GENERAL 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) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |