US3297601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substantially dry joint compound comprising calcium sulfate, polyvinyl acetate and starch
Assignee: United States Gypsum Co
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Filing: 1963-08-13
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Granted: 1967-01-10
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Expires: 1983-08-13
Abstract
No abstract record available.
Inventors
- 👤 Maynard Earl
- 👤 Mitchell P Ptasienski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:09
CPC Classifications
C; C08; C08L; C08L31/00; C08L31/02; C08L31/04; C04; C04B; C04B28/00; C04B28/14; C04B28/145; C04B28/146; C08K; C08K3/00; C08K3/30; C09; C09J; C09J103/00; C09J103/02; C04B2103/00; C04B2103/10; C04B2103/12; C04B2103/20; C04B2103/22; C04B2103/30; C04B2111/00; C04B2111/00474; C04B2111/00663; C04B2111/00672; C08L2666/00; C08L2666/02; C08L2666/54; C08L3/00; C08L3/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
53 words
A SUBSTANTIALLY DRY COMPOSITION ADAPTED FOR USE IN FINISHING JOINTS BETWEEN WALLBOARDS WHEN MIXED WITH WATER COMPRISING A MIXTURE OF CALCIUM SULFATE HEMIHYDRATE IN AN AMOUNT FROM ABOUT 45 TO 90% BY WEIGHT, SET CONTROL ADDITIVES FOR SAID CALCIUM SULFATE HEMIHYDRATE, DRY FINELY DIVIDED POLYVINYL ACETATE, A DRY PLASTICIZER FOR SAID POLYVINYL ACETATE.
Claim 2
Dependent Claim
53 words
A SUBSTANTIALLY DRY COMPOSITION ADAPTED FOR USE IN FINISHING JOINTS BETWEEN WALLBOARDS WHEN MIXED WITH WATER COMPRISING A MIXTURE OF CALCIUM SULFATE HEMIHYDRATE IN AN AMOUNT FROM ABOUT 45 TO 90% BY WEIGHT, SET CONTROL ADDITIVES FOR SAID CALCIUM SULFATE HEMIHYDRATE, DRY FINELY DIVIDED POLYVINYL ACETATE, A DRY PLASTICIZER FOR SAID POLYVINYL ACETATE.
Claim 3
Dependent Claim
38 words
A COMPOSITON ACCORDING TO CLAIM 1, WHEREIN A PORTION OF THE POLYVINYL ACETATE IS REPLACED WITH PARTIALLY CONVERTED PREGELLED STARCH, THE AMOUNT OF SAID STARCH BEING NOT MORE THAN THE AMOUNT OF POLYVINYL ACETATE PRESENT IN THE COMPOSITION.
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |