US2569138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated mattress pad
Assignee: Individual
•
Filing: 1949-11-14
•
Granted: 1951-09-25
•
Expires: 1969-11-14
Abstract
No abstract record available.
Inventors
- 👤 Howard C Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:33
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/34; H05B3/342; H05B2203/00; H05B2203/002; H05B2203/003; H05B2203/017
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US530053A
Cited
US1215610A
Cited
US1447181A
Cited
GB400301A
Cited
US2317189A
Cited
US2376902A
Cited
GB586745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |