US2085525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for stabilizing polymers
Assignee: Shell Development Co
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Filing: 1935-11-08
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Granted: 1937-06-29
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Expires: 1955-11-08
Abstract
No abstract record available.
Inventors
- 👤 Simo Martin De
- 👤 Frederick B Hilmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:59
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/50; B; B29; B29B; B29B7/00; B29B7/30; C08F2810/00; C08F2810/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-06-28 | 1940-12-28 | 1941-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-06-28 | 1944-12-28 | 1945-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-06-28 | 1948-12-28 | 1949-06-29 | $7700.00 | Window Closed / Lapsed |