US3248271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaped oxymethylene thermoplastic polymer and method of surface treating same
Assignee: Celanese Corp
•
Filing: 1961-05-08
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Granted: 1966-04-26
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Expires: 1981-05-08
Abstract
No abstract record available.
Inventors
- 👤 Francis J Rielly
- 👤 Conte Paul F Del
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:34
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/14; C08J2359/00; C08J2359/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
METHOD OF TREATING A SHAPED STRUCTURE OF AN OXYMETHYLENE THERMOPLASTIC POLYMER WHICH COMPRISES SUBJECTING SAID STRUCTURE TO AN OXIDIZING ENVIRONMENT TO ETCH ITS SURFACE AND THEREAFTER CONTACTING SAID STRUCTURE WITH A REACTANT MIXTURE CAPABLE OF REACTING WITH FORMALDEHYDE TO FORM A SPACE POLYMER.
Claim 2
Dependent Claim
43 words
METHOD OF TREATING A SHAPED STRUCTURE OF AN OXYMETHYLENE THERMOPLASTIC POLYMER WHICH COMPRISES SUBJECTING SAID STRUCTURE TO AN OXIDIZING ENVIRONMENT TO ETCH ITS SURFACE AND THEREAFTER CONTACTING SAID STRUCTURE WITH A REACTANT MIXTURE CAPABLE OF REACTING WITH FORMALDEHYDE TO FORM A SPACE POLYMER.
Claim 3
Dependent Claim
47 words
A SHAPED STRUCTURE OF AN OXYMETHYLENE THERMOPLASTIC COPOLYMER HAVING SUCCESSIVELY RECURRING OXYMETHYLENE GROUPS AND HAVING OXYALKYLENE GROUPS WITH ADJACENT CARBON ATOMS, SAID COPOLYMER BEING A COPOLYMER OF TRIOXANE AND A CYCLIC ETHER HAVING ADJACENT CARBON ATOMS, AND SAID STRUCTURE HAVING A SURFACE ETCHED WITH AN OXIDIZING ACID.
Claim 4
Dependent Claim
47 words
A SHAPED STRUCTURE OF AN OXYMETHYLENE THERMOPLASTIC COPOLYMER HAVING SUCCESSIVELY RECURRING OXYMETHYLENE GROUPS AND HAVING OXYALKYLENE GROUPS WITH ADJACENT CARBON ATOMS, SAID COPOLYMER BEING A COPOLYMER OF TRIOXANE AND A CYCLIC ETHER HAVING ADJACENT CARBON ATOMS, AND SAID STRUCTURE HAVING A SURFACE ETCHED WITH AN OXIDIZING ACID.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |