US2563383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terminally unsaturated polythio polyethers
Assignee: Shell Development Co
•
Filing: 1949-01-29
•
Granted: 1951-08-07
•
Expires: 1969-01-29
Abstract
No abstract record available.
Inventors
- 👤 William E Vaughan
- 👤 Frederick F Rust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:42
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372; C08G; C08G75/00; C08G75/02; C08G75/04; C08G75/045; C08G75/12; C10; C10M; C10M107/00; C10M107/46; C10M3/00; C10M2221/00; C10M2221/04; C10M2221/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A POLYMER OF THE FORMULA, CH2=CHCH2O(CH2)3
Claim 2
Dependent Claim
6 words
A POLYMER OF THE FORMULA, CH2=CHCH2O(CH2)3
References Cited (Backward Citations)
US2043941A
Cited
US2163176A
Cited
US2352435A
Cited
US2230966A
Cited
US2398479A
Cited
US2392294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |