Patent AT111186B successfully refreshed from Google Patents.
Patent US2441602A successfully refreshed from Google Patents.
US2441602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of products from pentaerythritol process waste liquors
Assignee: Heyden Chemical Corp
•
Filing: 1943-11-23
•
Granted: 1948-05-18
•
Expires: 1963-11-23
Abstract
No abstract record available.
Inventors
- 👤 John E Snow
- 👤 Robert H Barth
- 👤 Ralph J Boesel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:47
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/18; C07C31/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |