Patent US2612155A successfully refreshed from Google Patents.
US2612155A
Expired / Lapsed
US
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Chemical heating pad
Assignee: Individual
•
Filing: 1949-07-09
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Granted: 1952-09-30
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Expires: 1969-07-09
Abstract
No abstract record available.
Inventors
- 👤 Mendez Alfredo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:31
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; A61F7/03; A61F7/032; A61F7/034; A61J; A61J9/00; A61J9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
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US2020826A
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Cited
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Cited
US2573791A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |