US2664997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Package containing n-alkyl pyrrolidone-2, composition thereof, and process for absorbing acetylene thereby
Assignee: Honeywell International Inc
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Filing: 1949-11-10
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Granted: 1954-01-05
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Expires: 1969-11-10
Abstract
No abstract record available.
Inventors
- 👤 John C Eck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:54
CPC Classifications
C; C10; C10L; C10L3/00; C10L3/02; C10L3/04; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
28 words
IN COMBUSTION A SOLUTION OF ACETYLENE IN NALKYL PYRROLIDONE-2 WITHIN A CONTAINER FOR SAID SOLUTION, SAID ALKYL PYRROLIDONE CONTAINING 1 TO 8 CARBON ATOMS IN THE ALKYL RADICAL.
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) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |