US3050511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block copolymers of alkenyl aromatic hydrocarbons and alkylene oxides
Assignee: Dow Chemical Co
•
Filing: 1958-09-15
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Granted: 1962-08-21
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Expires: 1978-09-15
Abstract
No abstract record available.
Inventors
- 👤 Michael M Szwarc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:59
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/04; C08G65/06; C08G65/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A POLYMERIC COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF A BLOCK COPOLYMER SELECTED FROM THE GROUP CONSISTING OF BLOCK COPOLYMERS HAVING THE GENERAL FORMULAE:
Claim 2
Dependent Claim
23 words
A POLYMERIC COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF A BLOCK COPOLYMER SELECTED FROM THE GROUP CONSISTING OF BLOCK COPOLYMERS HAVING THE GENERAL FORMULAE:
References Cited (Backward Citations)
US2835658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |