Patent US2916261A successfully refreshed from Google Patents.
US2916261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall construction embodying heating system
Assignee: Johns Manville Corp
•
Filing: 1952-12-19
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Granted: 1959-12-08
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Expires: 1972-12-19
Abstract
No abstract record available.
Inventors
- 👤 John S Parkinson
- 👤 Iii William A Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:06
CPC Classifications
F; F24; F24D; F24D5/00; F24D5/06; F24D5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB403899A
Cited
US2172771A
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US2221001A
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US2189207A
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US2337584A
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US2486563A
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US2548036A
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US2628078A
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US2621027A
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US2660409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |