Patent US3527677A successfully refreshed from Google Patents.
US3527677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dehydration of aqueous acrylic acid solutions by extractive - azeotropic distillation with 2-ethylhexanol or 2-ethylhexylacrylate
Assignee: Goodrich Corp
•
Filing: 1969-03-06
•
Granted: 1970-09-08
•
Expires: 1989-03-06
Abstract
No abstract record available.
Inventors
- 👤 Jerome W Harpring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:30
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/43; C07C51/44; C07C51/46; Y; Y10; Y10S; Y10S203/00; Y10S203/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2922815A
Cited
US3432401A
Cited
US3344178A
Cited
US3433831A
Cited
US3433788A
Cited
US3414485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |