US3426021A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphine compounds
Assignee: Dow Chemical Co
•
Filing: 1964-03-02
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Granted: 1969-02-04
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Expires: 1984-03-02
Abstract
No abstract record available.
Inventors
- 👤 Dietmar Seyferth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:35
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6527; C07F9/6533; C07F9/28; C07F9/50; C07F9/505; C07F9/53; C07F9/5304; C07F9/5308; C07F9/5312; C07F9/5325; C07F9/5329; C07F9/553; C07F9/576; C07F9/58; C07F9/59
Claims Analysis
Total Claims: 0
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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) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |