US2765113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow-walled boxes
Assignee: Individual
•
Filing: 1953-04-13
•
Granted: 1956-10-02
•
Expires: 1973-04-13
Abstract
No abstract record available.
Inventors
- 👤 Marshall I Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:55
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/20; B65D5/2004; B65D5/2009
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1758512A
Cited
US2028276A
Cited
US2203737A
Cited
US2519831A
Cited
US2494234A
Cited
US2641858A
Cited
US2512023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |