US2507802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dimethylamino vitamin a
Assignee: Research Corp
•
Filing: 1946-11-22
•
Granted: 1950-05-16
•
Expires: 1966-11-22
Abstract
No abstract record available.
Inventors
- 👤 Nicholas A Milas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:36
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/18; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
AS A NEW PRODUCT A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
9 words
AS A NEW PRODUCT A COMPOUND OF 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) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |