Patent US1507403A successfully refreshed from Google Patents.
Patent US3464178A successfully refreshed from Google Patents.
US3464178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite floor structure-method of installation
Assignee: Armstrong World Industries Inc
•
Filing: 1965-06-08
•
Granted: 1969-09-02
•
Expires: 1985-06-08
Abstract
No abstract record available.
Inventors
- 👤 James W Deichert
- 👤 Richard J Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:19
CPC Classifications
E; E04; E04F; E04F15/00; E04F15/16; Y; Y10; Y10T; Y10T428/00; Y10T428/18; Y10T428/183; Y10T428/187
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |