US2797573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated partition
Assignee: Individual
•
Filing: 1948-01-07
•
Granted: 1957-07-02
•
Expires: 1968-01-07
Abstract
No abstract record available.
Inventors
- 👤 Eslie B Hummer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:08
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/043; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24752
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1156753A
Cited
US1980900A
Cited
US2133108A
Cited
US2283582A
Cited
GB541733A
Cited
US2305247A
Cited
US2295248A
Cited
US2361733A
Cited
US2472756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |