US2436614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid styrene polymer formation at low temperatures
Assignee: Standard Oil Development Co
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Filing: 1942-07-10
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Granted: 1948-02-24
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Expires: 1962-07-10
Abstract
No abstract record available.
Inventors
- 👤 William J Sparks
- 👤 Henry B Kellog
- 👤 Donald C Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:19
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04
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) | 1951-02-23 | 1951-08-25 | 1952-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-23 | 1955-08-25 | 1956-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-23 | 1959-08-25 | 1960-02-24 | $7700.00 | Window Closed / Lapsed |