Patent US2859239A successfully refreshed from Google Patents.
US2859239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic acid compounds
Assignee: Dow Chemical Co
•
Filing: 1956-08-17
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Granted: 1958-11-04
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Expires: 1976-08-17
Abstract
No abstract record available.
Inventors
- 👤 Walter B Trapp
- 👤 Donald E Pletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:03
CPC Classifications
C; C11; C11B; C11B9/00; C11B9/0026; C11B9/0034
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE STRUCTURE
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE STRUCTURE
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) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |