US3402179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phthalimidomethyl alkynyl ethers
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1966-01-21
•
Granted: 1968-09-17
•
Expires: 1986-01-21
Abstract
No abstract record available.
Inventors
- 👤 Fujimoto Keimei
- 👤 Okuno Yositosi
- 👤 Ueda Kenzo
- 👤 Horie Sadao
- 👤 Mizutani Toshio
- 👤 Nodera Katsuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:51
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3221019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |