US2461679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reacting a piperylene with a halo substituted maleic anhydride
Assignee: Wingfoot Corp
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Filing: 1944-09-04
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Granted: 1949-02-15
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Expires: 1964-09-04
Abstract
No abstract record available.
Inventors
- 👤 Albert M Clifford
- 👤 Clyde E Gleim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:03
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F236/00; C08F236/02; C08F236/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-15 | 1952-08-16 | 1953-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-15 | 1956-08-16 | 1957-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-15 | 1960-08-16 | 1961-02-15 | $7700.00 | Window Closed / Lapsed |