US2941010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetylenic ether polymers and their preparation
Assignee: ATK Launch Systems LLC
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Filing: 1957-07-03
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Granted: 1960-06-14
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Expires: 1977-07-03
Abstract
No abstract record available.
Inventors
- 👤 David J Mann
- 👤 Donald D Perry
- 👤 Rita M Dudak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:10
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105; C08; C08G; C08G4/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
THE METHOD OF PRODUCING AN ACETYLENIC ETHER POLYMER WHICH COMPRISES, FORMING A MIXTURE OF APPROXIMATELY EQUIMOLAR QUANTITIES OF 2-BUTYNE-1,4-DIOL AND DI-NPROPYL FORMAL WITH A CATALYTIC AMOUNT OF P-TOLUENESULFONIC ACID, CAUSING CONDENSATION-POLYMERIZATION IN SAID MIXTURE BY HEATING THE SAME AT A TEMPERATURE IN THE RANGE FROM AT LEAST 100*C. TO ABOUT 250*C. WHILE REMOVING BY-PRODUCED N-PROPANOL FROM ANY UNCHANGED REACTANTS AND FROM THE RESULTING POLYMER, AND ISOLATING SAID POLYMER AS POLY(2-BUTYNE-1,4-DIOXYMETHYLENE).
Claim 2
Independent Claim
70 words
THE METHOD OF PRODUCING AN ACETYLENIC ETHER POLYMER WHICH COMPRISES, FORMING A MIXTURE OF APPROXIMATELY EQUIMOLAR QUANTITIES OF 2-BUTYNE-1,4-DIOL AND DI-NPROPYL FORMAL WITH A CATALYTIC AMOUNT OF P-TOLUENESULFONIC ACID, CAUSING CONDENSATION-POLYMERIZATION IN SAID MIXTURE BY HEATING THE SAME AT A TEMPERATURE IN THE RANGE FROM AT LEAST 100*C. TO ABOUT 250*C. WHILE REMOVING BY-PRODUCED N-PROPANOL FROM ANY UNCHANGED REACTANTS AND FROM THE RESULTING POLYMER, AND ISOLATING SAID POLYMER AS POLY(2-BUTYNE-1,4-DIOXYMETHYLENE).
Claim 3
Dependent Claim
2 words
POLY(2-BUTYNE-1,4-DIC YMETHYLENE).
Claim 4
Dependent Claim
2 words
POLY(2-BUTYNE-1,4-DIC YMETHYLENE).
References Cited (Backward Citations)
US2071252A
Cited
US2469288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |