US2462581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warp guide
Assignee: HEINZE ELECTRIC Co
•
Filing: 1945-08-08
•
Granted: 1949-02-22
•
Expires: 1965-08-08
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:51
CPC Classifications
D; D02; D02H; D02H13/00; D02H13/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US772800A
Cited
US1341244A
Cited
US1567102A
Cited
US1757940A
Cited
US2039209A
Cited
US2209597A
Cited
US2147258A
Cited
US2249390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-22 | 1952-08-23 | 1953-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-22 | 1956-08-23 | 1957-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-22 | 1960-08-23 | 1961-02-22 | $7700.00 | Window Closed / Lapsed |