Patent US4442533A successfully refreshed from Google Patents.
Patent US640534A successfully refreshed from Google Patents.
US640534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warming-pad.
Assignee: Individual
•
Filing: 1898-10-01
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Granted: 1900-01-02
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Expires: 1918-10-01
Abstract
No abstract record available.
Inventors
- 👤 Lyman Cheney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:16
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; Y; Y10; Y10S; Y10S165/00; Y10S165/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1903-01-02 | 1903-07-04 | 1904-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-01-02 | 1907-07-04 | 1908-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-01-02 | 1911-07-04 | 1912-01-03 | $7700.00 | Window Closed / Lapsed |