US2671813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogen substituted dihydroxy diaryl methanes
Assignee: Monsanto Chemicals Ltd
•
Filing: 1951-11-02
•
Granted: 1954-03-09
•
Expires: 1971-11-02
Abstract
No abstract record available.
Inventors
- 👤 Paul J Stoffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:57
CPC Classifications
C; C07; C07C; C07C39/00; C07C39/24; C07C39/367; C07C37/00; C07C37/11; C07C37/115; C07C37/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE STRUCTURE
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE STRUCTURE
References Cited (Backward Citations)
US1707181A
Cited
US2544826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |