US2879275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1, 3-disubstituted derivatives of 4, 5, 6, 7, 10, 10-hexachloro-4, 7-endomethylene-4, 7, 8, 9-tetrahydrophthalane
Assignee: Ruhrchemie AG
•
Filing: 1957-08-09
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Granted: 1959-03-24
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Expires: 1977-08-09
Abstract
No abstract record available.
Inventors
- 👤 Feichtinger Hans
- 👤 Puschhof Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:56
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/93
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A TETRAHYDROPHTHALANE DERIVATIVE HAVING THE FORMULA:
Claim 2
Dependent Claim
6 words
A TETRAHYDROPHTHALANE DERIVATIVE 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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |