US2489336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation products of mononuclear monohydric phenols, formaldehyde, and mononuclear dihydric phenols
Assignee: Hexion Inc
•
Filing: 1945-02-16
•
Granted: 1949-11-29
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Expires: 1965-02-16
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Spahr
- 👤 William R Moffitt
- 👤 Everett H Pryde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:04
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB325861A
Cited
US1802390A
Cited
US1851021A
Cited
US1889751A
Cited
US2101944A
Cited
US2211951A
Cited
US2150698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |