Patent US2797303A successfully refreshed from Google Patents.
US2797303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for producing hermetically sealed cartridges
Assignee: Individual
•
Filing: 1955-10-19
•
Granted: 1957-06-25
•
Expires: 1975-10-19
Abstract
No abstract record available.
Inventors
- 👤 Kershaw Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:54
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/20; H01J5/22; H01J5/28; H01J2893/00; H01J2893/0033; H01J2893/0037; H01J2893/0044
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US632505A
Cited
US1569323A
Cited
US1538590A
Cited
US2015193A
Cited
US2101156A
Cited
US2145276A
Cited
US2166830A
Cited
DE700691C
Cited
US2319407A
Cited
US2316597A
Cited
US2360660A
Cited
FR951480A
Cited
US2397263A
Cited
US2481042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |