US3428651A
Expired / Lapsed
US
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Esters of chrysanthemum-monocarboxylic acid and chrysanthemum-dicarboxylic acid monomethyl ester with n-hydroxy methyl maleimides
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1966-02-11
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Granted: 1969-02-18
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Expires: 1986-02-11
Abstract
No abstract record available.
Inventors
- 👤 Takeaki Kato
- 👤 Kenzo Ueda
- 👤 Sadao Horie
- 👤 Toshio Mizutani
- 👤 Keimei Fujimoto
- 👤 Yositosi Okuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/44; C07D207/444; C07D207/448; C07D207/452; C07D209/00; C07D209/02; C07D209/44; C07D209/46; C07D209/48; C07D209/49; C07D209/56; C07D209/58; C07D209/62; C07D209/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1915334A
Cited
US2075359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |