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US3407181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
alpha-methyl-alpha-dichlorophenyl-beta-propiolactones and polymers thereof
Assignee: EIDP Inc
•
Filing: 1965-04-23
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Granted: 1968-10-22
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Expires: 1985-04-23
Abstract
No abstract record available.
Inventors
- 👤 Roger C Kierstead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:09
CPC Classifications
C; C07; C07D; C07D305/00; C07D305/02; C07D305/10; C07D305/12; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6822
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3326938A
Cited
US3268486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |