Patent US2980548A successfully refreshed from Google Patents.
US2980548A
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US
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Plaster composition
Assignee: United States Gypsum Co
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Filing: 1955-04-29
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Granted: 1961-04-18
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Expires: 1975-04-29
Abstract
No abstract record available.
Inventors
- 👤 Hampton Archie Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:39
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/003; C04B28/00; C04B28/14; Y; Y10; Y10S; Y10S106/00; Y10S106/01; Y10S106/02; Y10S106/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN THE PROCESS OF OVERCOMING THE DIFFICULTY OF MIXING AND SPREADING A PLASTIC STICKY MORTAR FORMED FROM A MIXTURE OF WATER, A HIGHLY PLASTIC CALCIUM SULFATE HEMIHYDRATE AND A LIGHTWEIGHT GRANULAR AGGREGATE SELECTED FROM THE GROUP CONSISTING OF EXPANDED PERLITE AND EXPANDED VERMICULITE THE IMPROVEMENT COMPRISING INTRODUCING A WETTING-ANTIFOAMING AGENT INTO SAID MORTAR PRIOR TO SPREADING.
Claim 2
Dependent Claim
56 words
IN THE PROCESS OF OVERCOMING THE DIFFICULTY OF MIXING AND SPREADING A PLASTIC STICKY MORTAR FORMED FROM A MIXTURE OF WATER, A HIGHLY PLASTIC CALCIUM SULFATE HEMIHYDRATE AND A LIGHTWEIGHT GRANULAR AGGREGATE SELECTED FROM THE GROUP CONSISTING OF EXPANDED PERLITE AND EXPANDED VERMICULITE THE IMPROVEMENT COMPRISING INTRODUCING A WETTING-ANTIFOAMING AGENT INTO SAID MORTAR PRIOR TO SPREADING.
References Cited (Backward Citations)
US2198800A
Cited
US2382561A
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US2351109A
Cited
US2634208A
Cited
US2662024A
Cited
US2715583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |