US2920638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valved container cap having a frangible disk therein
Assignee: Heckethorn Manufacturing and Supply Co
•
Filing: 1956-11-05
•
Granted: 1960-01-12
•
Expires: 1976-11-05
Abstract
No abstract record available.
Inventors
- 👤 John E Heckethorn
- 👤 Vollertzen Sven Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:28
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/14; F16K17/16; F16K17/162; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1639; Y10T137/1692; Y10T137/1714; Y10T137/1797; Y10T137/1812
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
BE509789A
Cited
US149050A
Cited
US443873A
Cited
US580118A
Cited
GB189604151A
Cited
US1158420A
Cited
FR624208A
Cited
US2498596A
Cited
US2715908A
Cited
US2796080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |