Patent US2645213A successfully refreshed from Google Patents.
Patent US3234230A successfully refreshed from Google Patents.
US3234230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroperoxy pyridinium compounds
Assignee: Dow Chemical Co
•
Filing: 1962-12-10
•
Granted: 1966-02-08
•
Expires: 1982-12-10
Abstract
No abstract record available.
Inventors
- 👤 William G Lloyd
- 👤 Wendell L Roelofs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:06
CPC Classifications
C; C07; C07C; C07C409/00; C07C409/40; C07C407/00; C07C409/02; C07C409/04; C07C409/08; C08; C08F; C08F4/00; C08F4/28; C08F4/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2872453A
Cited
US2816113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |