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US2142980A
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High molecular weight polar compounds and process of making the same
Assignee: Shell Development Co
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Filing: 1937-02-27
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Granted: 1939-01-03
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Expires: 1957-02-27
Abstract
No abstract record available.
Inventors
- 👤 Huijser Hendrik Willem
- 👤 Nooijer Christiaan Nicolaas De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:50
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/02; H02K19/04; H02K19/06; C; C06; C06F; C06F3/00; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C08; C08F; C08F8/00; C10; C10M; C10M143/00; C10M2209/00; C10M2209/02; C10M2209/04; C10M2209/06; C10M2209/062; C10M2209/08; C10M2209/086; C10M2209/10; C10M2211/00; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/04; C10M2213/06; C10M2213/062; C10M2217/00; C10M2217/02; C10M2217/04; C10M2221/00; C10M2221/04; C10M2221/041; C10M2225/00; C10M2225/02; C10M2227/00; C10M2227/06; C10M2227/061; C10M2227/09; C10N; C10N2050/00; C10N2050/10
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) | 1942-01-02 | 1942-07-04 | 1943-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-01-02 | 1946-07-04 | 1947-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-01-02 | 1950-07-04 | 1951-01-03 | $7700.00 | Window Closed / Lapsed |