US2492955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyoxyalkylene compounds
Assignee: Shell Development Co
•
Filing: 1946-08-31
•
Granted: 1950-01-03
•
Expires: 1966-08-31
Abstract
No abstract record available.
Inventors
- 👤 Ballard Seaver Ames
- 👤 Morris Rupert Clarke
- 👤 John L Van Winkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:26
CPC Classifications
C; C10; C10M; C10M3/00; C08; C08G; C08G65/00; C08G65/34; C10M2213/00; C10M2213/04; C10M2213/06; C10M2221/00; C10M2221/02; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A NEW COMPOSITION OF MATTER COMPRISING A MIXTURE OF COPOLYMERS HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
14 words
A NEW COMPOSITION OF MATTER COMPRISING A MIXTURE OF COPOLYMERS HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US1984421A
Cited
US2071250A
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US2089569A
Cited
GB425728A
Cited
US2146324A
Cited
US2146323A
Cited
US2258892A
Cited
US2383915A
Cited
US2434978A
Cited
US2425755A
Cited
US2425845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |