US3471682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant heating apparatus
Assignee: Armstrong World Industries Inc
•
Filing: 1968-02-07
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Granted: 1969-10-07
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Expires: 1988-02-07
Abstract
No abstract record available.
Inventors
- 👤 Richard M Hisey
- 👤 Joseph H Kyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:57
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/0033; H05B3/0038; H05B3/0057; B; B29; B29C; B29C35/00; B29C35/02; B29C35/08; B29C35/10; B29C43/00; B29C43/22; B29C35/0805; B29C2035/0822; B29K; B29K2105/00; B29K2105/25; B29K2105/251; B29L; B29L2007/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1776845A
Cited
US2432800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |