Patent US2653969A successfully refreshed from Google Patents.
US2653969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing tertiary acrylic acid esters from acetylene
Assignee: BASF Schweiz AG
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Filing: 1950-06-19
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Granted: 1953-09-29
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Expires: 1970-06-19
Abstract
No abstract record available.
Inventors
- 👤 Albrecht Otto
- 👤 Maeder Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:07
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C69/533; C07C69/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS FOR THE MANUFACTURE OF AN ACRYLIC ACID ESTER WHICH COMPRISES TREATING ACETYLENE WITH NICKEL CARBONYL WITH THE ADDITION OF AN ACID AND OF A HYDROXY COMPOUND WHICH CONTAINS AT LEAST ONE HYDROXY GROUP BOUND TO A ALIPHATIC CARBON ATOM, THE THREE REMAINING VALENCES OF WHICH ARE BOUND TO CARBON.
Claim 2
Dependent Claim
51 words
A PROCESS FOR THE MANUFACTURE OF AN ACRYLIC ACID ESTER WHICH COMPRISES TREATING ACETYLENE WITH NICKEL CARBONYL WITH THE ADDITION OF AN ACID AND OF A HYDROXY COMPOUND WHICH CONTAINS AT LEAST ONE HYDROXY GROUP BOUND TO A ALIPHATIC CARBON ATOM, THE THREE REMAINING VALENCES OF WHICH ARE BOUND TO CARBON.
References Cited (Backward Citations)
US2117349A
Cited
US2466738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |