US2649993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of evacuating, filling, sealing, and releasing gas in a container
Assignee: Union Carbide Corp
•
Filing: 1947-02-14
•
Granted: 1953-08-25
•
Expires: 1967-02-14
Abstract
No abstract record available.
Inventors
- 👤 John N Burdick
- 👤 Harvey E Kinne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:29
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US908378A
Cited
US1726111A
Cited
US1914634A
Cited
US1911410A
Cited
US2262176A
Cited
US2202337A
Cited
US2419112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |