Patent US2507750A successfully refreshed from Google Patents.
US2507750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-water bottle stopper and heat maintainer
Assignee: Individual
•
Filing: 1948-08-20
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Granted: 1950-05-16
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Expires: 1968-08-20
Abstract
No abstract record available.
Inventors
- 👤 George W Barlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:39
CPC Classifications
A; A47; A47C; A47C21/00; A47C21/04; A47C21/048; H; H05; H05B; H05B3/00; H05B3/78; H05B3/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |