Patent US3435582A successfully refreshed from Google Patents.
US3435582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wallboard construction
Assignee: United States Gypsum Co
•
Filing: 1966-03-02
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Granted: 1969-04-01
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Expires: 1986-03-02
Abstract
No abstract record available.
Inventors
- 👤 Virgil V Disney
- 👤 Mitchell P Ptasienski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:08
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1638280A
Cited
US1514827A
Cited
US1997293A
Cited
US3180058A
Cited
US3385019A
Cited
US3300371A
Cited
US3391037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |