Patent US4411302A successfully refreshed from Google Patents.
Patent US2802797A successfully refreshed from Google Patents.
US2802797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient tile
Assignee: Armstrong World Industries Inc
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Filing: 1952-12-24
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Granted: 1957-08-13
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Expires: 1972-12-24
Abstract
No abstract record available.
Inventors
- 👤 Robert L Lerch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:33
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B26/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
A RESILIENT TILE COMPOSITION COMPRISING ABOUT 30% TO ABOUT 55% FINELY DIVIDED INORGANIC FILLER, ABOUT 25% TO ABOUT 50% FIBROUS MINERAL FILLER,ABOUT 15% TO ABOUT 23% OF AT LEAST ONE ROSIN-MODIFIED PHENOL-FORMALDEHYDE RESIN, OBTAINED BY REACTING PHENOL, FORMALDEHYDE, AND ROSIN AND THEREAFTER ESTERIFYING WITH A POLYHYDRIC ALCOHOL AND HAVING A SOFTENING POINT OF 105*C. TO 142*C., AND ABOUT 4% TO ABOUT 9% PLASTICIZER OF THE RESIN.
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) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |