Patent US3390503A successfully refreshed from Google Patents.
US3390503A
Expired / Lapsed
US
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Thermally responsive beam joint
Assignee: Armstrong World Industries Inc
•
Filing: 1965-09-10
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Granted: 1968-07-02
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Expires: 1985-09-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Ernest L Emerick
- 👤 James C Ollinger
- 👤 Henry J Roux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:51
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/06; E04B9/065; E04B9/067; E04B9/068; E04B9/08; E04B9/12; E04B9/122; Y; Y10; Y10S; Y10S52/00; Y10S52/05
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) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |