US2940955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin copolymer
Assignee: Shell USA Inc
•
Filing: 1956-10-15
•
Granted: 1960-06-14
•
Expires: 1976-10-15
Abstract
No abstract record available.
Inventors
- 👤 Edward C Shokal
- 👤 Paul A Devlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:41
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/18; C08F; C08F10/00; C08F8/00; C08F8/04; C08G2/26; Y; Y10; Y10S; Y10S525/00; Y10S525/94
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A COPOLYMER CONSISTING ESSENTIALLY OF AN ALPHA, BETA-UNSATURATED ALDEHYDE HAVING UP TO 10 CARBON ATOMS AND A NORMAL MONO-ALPHA-OLEFIN HAVING FROM 12-18 CARBON ATOMS, SAID COPOLYMER HAVING ABOUT 5 TO 45 MOLE PERCENT OF UNITS OF THE ALDEHYDE IN THE POLYMER MOLECULE.
Claim 2
Dependent Claim
42 words
A COPOLYMER CONSISTING ESSENTIALLY OF AN ALPHA, BETA-UNSATURATED ALDEHYDE HAVING UP TO 10 CARBON ATOMS AND A NORMAL MONO-ALPHA-OLEFIN HAVING FROM 12-18 CARBON ATOMS, SAID COPOLYMER HAVING ABOUT 5 TO 45 MOLE PERCENT OF UNITS OF THE ALDEHYDE IN THE POLYMER MOLECULE.
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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |