Patent US4892947A successfully refreshed from Google Patents.
US3136691A
Expired / Lapsed
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Aqueous solution of local anesthetic maintained under pressure
Assignee: Astra USA Inc
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Filing: 1962-03-05
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Granted: 1964-06-09
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Expires: 1982-03-05
Abstract
No abstract record available.
Inventors
- 👤 Nordstrom George
- 👤 Aldo P Truant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:33
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/185; A61K31/205; A61K31/16; A61K47/00; A61K47/02; A61K9/00; A61K9/0012; A61K9/0014; A61K9/0019; C; C07; C07C; C07C237/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
IN A PROCESS OF INCREASING THE ANESTHETIZING EFFECT OF AQUEOUS SOLUTIONS OF LIDOCAINE, THE STEP WHICH CONSISTS IN INTRODUCING CARBON DIOXIDE UNDER PRESSURE INTO A SUSPENSION OF THE LIDOCAINE BASE AT A TEMPERATURE NOT SUBSTANTIALLY EXCEEDING ROOM TEMPERATURE UNTIL THE LIDOCAINE BASE IS DISSOLVED.
Claim 2
Dependent Claim
44 words
IN A PROCESS OF INCREASING THE ANESTHETIZING EFFECT OF AQUEOUS SOLUTIONS OF LIDOCAINE, THE STEP WHICH CONSISTS IN INTRODUCING CARBON DIOXIDE UNDER PRESSURE INTO A SUSPENSION OF THE LIDOCAINE BASE AT A TEMPERATURE NOT SUBSTANTIALLY EXCEEDING ROOM TEMPERATURE UNTIL THE LIDOCAINE BASE IS DISSOLVED.
References Cited (Backward Citations)
US2953284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |