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US3179618A
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Shaped condensation polymers
Assignee: Celanese Corp
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Filing: 1961-05-03
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Granted: 1965-04-20
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Expires: 1981-05-03
Abstract
No abstract record available.
Inventors
- 👤 Roberts William John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:34
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/05; C08J3/09; C08J3/091; C08K; C08K3/00; C08K3/38; D; D01; D01F; D01F6/00; D01F6/58; C08J2377/00; Y; Y10; Y10S; Y10S524/00; Y10S524/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS COMPRISING AGITATING A CONDENSATION POLYMER HAVING AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF NITROGEN AND OXYGEN AS AN INTEGRAL PART OF THE POLYMER CHAIN, IN A SOLVENT TO FORM A SLURRY AND INTRODUCING BORON TRIFLUORIDE GAS INTO SAID SLURRY UNTIL SAID POLYMER DISSOLVES.
Claim 2
Dependent Claim
47 words
A PROCESS COMPRISING AGITATING A CONDENSATION POLYMER HAVING AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF NITROGEN AND OXYGEN AS AN INTEGRAL PART OF THE POLYMER CHAIN, IN A SOLVENT TO FORM A SLURRY AND INTRODUCING BORON TRIFLUORIDE GAS INTO SAID SLURRY UNTIL SAID POLYMER DISSOLVES.
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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |