US2691044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ketol compounds and method for making same
Assignee: SCHENLEY LABORATORIES Inc
•
Filing: 1951-03-27
•
Granted: 1954-10-05
•
Expires: 1971-03-27
Abstract
No abstract record available.
Inventors
- 👤 Kolling Heinrich
- 👤 Lettre Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:15
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/20; C07C49/255; C07C45/00; C07C45/61; C07C45/64; C07C49/24; C07C49/245
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
A SUBSTANCE OF THE CLASS CONSISTING OF THE STILBANE ALPHA KETOL COMPOUNDS REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
16 words
A SUBSTANCE OF THE CLASS CONSISTING OF THE STILBANE ALPHA KETOL COMPOUNDS REPRESENTED BY THE FORMULA:
Claim 3
Dependent Claim
12 words
THE PROCESS THAT COMPRISES REACTING A STILBANE NITRILE REPRESENTED BY THE FORMULA:
Claim 4
Dependent Claim
12 words
THE PROCESS THAT COMPRISES REACTING A STILBANE NITRILE REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
US2307700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |