US2830722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure for vacuum-insulated containers
Assignee: American Thermos Products Co
•
Filing: 1954-01-25
•
Granted: 1958-04-15
•
Expires: 1974-01-25
Abstract
No abstract record available.
Inventors
- 👤 Louis J Darmstadt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:22
CPC Classifications
A; A47; A47J; A47J41/00; A47J41/0005; A47J41/0011
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |