US2985664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hexuronic acid derivatives
Assignee: Individual
•
Filing: 1957-05-29
•
Granted: 1961-05-23
•
Expires: 1977-05-29
Abstract
No abstract record available.
Inventors
- 👤 Ernst T Krebs
- 👤 Jr Ernst T Krebs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:28
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/20; C07H15/203; B; B65; B65D; B65D81/00; B65D81/24; B65D81/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
7 words
ALKALI METAL SALTS OF MANDELO NITRILE-A-D-GALACTURONIC ACID.
References Cited (Backward Citations)
US2562200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |