US3087913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of trioxane and vinyl ethers
Assignee: Celanese Corp
•
Filing: 1959-03-11
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Granted: 1963-04-30
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Expires: 1979-03-11
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Kray
- 👤 Fazio Charles A De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:44
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/18; C08G2/26; C08G2/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A WATER-INSOLUBLE COPOLYMER SOLID AT ROOM TEMPERATURE CONSISTING ESSENTIALLY OF RECURRING OXYMETHYLENE GROUPS AND RECURRING ETHYLENE GROUPS IN WHICH ONE CARBON ATOM HAS DIRECTLY ATTACHED THERETO AN -OR SUBSTITUENT AS A SIDE CHAIN WHEREIN R IS AN ORGANIC RADICAL FREE OF INTERFERING FUNCTIONAL GROUPS.
Claim 2
Dependent Claim
44 words
A WATER-INSOLUBLE COPOLYMER SOLID AT ROOM TEMPERATURE CONSISTING ESSENTIALLY OF RECURRING OXYMETHYLENE GROUPS AND RECURRING ETHYLENE GROUPS IN WHICH ONE CARBON ATOM HAS DIRECTLY ATTACHED THERETO AN -OR SUBSTITUENT AS A SIDE CHAIN WHEREIN R IS AN ORGANIC RADICAL FREE OF INTERFERING FUNCTIONAL GROUPS.
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) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |