US2459503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bracket
Assignee: Individual
•
Filing: 1945-06-11
•
Granted: 1949-01-18
•
Expires: 1965-06-11
Abstract
No abstract record available.
Inventors
- 👤 Eric T G Dahlstrom
- 👤 Caplan Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:35
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/40; E06B9/42; E06B9/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189319725A
Cited
US658006A
Cited
US704351A
Cited
GB190903889A
Cited
GB190925595A
Cited
US1203765A
Cited
US1600374A
Cited
US1808628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-18 | 1952-07-19 | 1953-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-18 | 1956-07-19 | 1957-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-18 | 1960-07-19 | 1961-01-18 | $7700.00 | Window Closed / Lapsed |