US2820738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xjhitc
Assignee: —
•
Filing: —
•
Granted: 1958-01-21
•
Expires: 1975-01-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:11
CPC Classifications
C; C07; C07C; C07C205/00; C07C205/45; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
2-(P-CHLOROPHENYL)-INDAN-1.3-DIONE.
Claim 2
Dependent Claim
1 words
2-(P-CHLOROPHENYL)-INDAN-1.3-DIONE.
References Cited (Backward Citations)
US2672483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |