US3072609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxymethylene copolymers
Assignee: Celanese Corp
•
Filing: 1959-06-22
•
Granted: 1963-01-08
•
Expires: 1979-06-22
Abstract
No abstract record available.
Inventors
- 👤 Frank M Berardinelli
- 👤 Robert W Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:10
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/10; C08G2/18; C08G2/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A COPOLYMER OF TRIOXANE AND A COMONOMER OF THE GROUP CONSISTING OF EPICHLOROHYDRIN AND 4-CHLOROMETHYL1,3-DIOXOLANE.
Claim 2
Dependent Claim
15 words
A COPOLYMER OF TRIOXANE AND A COMONOMER OF THE GROUP CONSISTING OF EPICHLOROHYDRIN AND 4-CHLOROMETHYL1,3-DIOXOLANE.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |