US3219675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alpha,omega-alkandioic acids and omega-formylalkanoic acids
Assignee: Columbian Carbon Co
•
Filing: 1961-11-02
•
Granted: 1965-11-23
•
Expires: 1981-11-02
Abstract
No abstract record available.
Inventors
- 👤 Seekircher Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:16
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A PROCESS FOR THE PREPARATION OF AN W-FORMYLALKANOIC ACID OF THE FORMULA, OHC-(CH2)N-CO2H, WHEREIN N HAS A VALUE OF FROM 4 TO 10, AND THE A,W-ALKANDIOIC ACID CORRESPONDING THERETO, OF THE FORMULA,
Claim 2
Dependent Claim
32 words
A PROCESS FOR THE PREPARATION OF AN W-FORMYLALKANOIC ACID OF THE FORMULA, OHC-(CH2)N-CO2H, WHEREIN N HAS A VALUE OF FROM 4 TO 10, AND THE A,W-ALKANDIOIC ACID CORRESPONDING THERETO, OF THE FORMULA,
References Cited (Backward Citations)
US2865937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |