US2784237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chloral derivatives and methods for their preparation
Assignee: Wyeth LLC
•
Filing: 1954-06-16
•
Granted: 1957-03-05
•
Expires: 1974-06-16
Abstract
No abstract record available.
Inventors
- 👤 William F Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:47
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF PENTAERYTHRITOL TETRACHLORAL HEMIACETAL AND PENTAERYTHRITOL TRICHLORAL HEMIACETAL.
Claim 2
Dependent Claim
15 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF PENTAERYTHRITOL TETRACHLORAL HEMIACETAL AND PENTAERYTHRITOL TRICHLORAL HEMIACETAL.
References Cited (Backward Citations)
US2245260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |