US3108008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gypsum composition and method
Assignee: Puget Sound Pulp and Timber Co
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Filing: 1960-04-29
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Granted: 1963-10-22
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Expires: 1980-04-29
Abstract
No abstract record available.
Inventors
- 👤 King Ellis Gray
- 👤 Adolphson Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:55
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/14; C04B20/00; C04B20/02; C04B24/00; C04B24/16; C04B24/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
A PLASTIC ALURRY COMPRISING CALCINED GYPSUM, WATER, AND AN ADDITIVE, SAID ADDITIVE COMPRISING THE PRODUCT PREPARED BY COMPLEXING SULFONATED LIGNIN-CONTAINING MATERIAL WITH A METAL SELECTED FROM THE GROUP CONSISTING OF IRON, ALUMINUM, CHROMIUM, COPPER AND MIXTURES THEREOF TO PRODUCE A WATER SOLUBLE PRODUCT, SAID ADDITIVE BEING PRESENT IN AN AMOUNT OF FROM ABOUT 0.01% TO ABOUT 5% BY WEIGHT, BASED ON THE WEIGHT OF SAID GYPSUM.
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) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |