US3369929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plaster on metal application
Assignee: National Gypsum Co
•
Filing: 1962-09-21
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Granted: 1968-02-20
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Expires: 1982-09-21
Abstract
No abstract record available.
Inventors
- 👤 Donald J Petersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:35
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/14; E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; E04B1/941; E04B1/943; E04B1/944; C04B2111/00; C04B2111/00474; C04B2111/00482; C04B2111/00525; C04B2111/20; C04B2111/28; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/24; Y10T428/24744; Y10T428/26
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
99 words
A SETTABLE GYPSUM PLASTER COMPOSITION CAPABLE, UPON ADMIXTURE WITH WATER, OF TENACIOUSLY ADHERING TO A SUBSTANTIALY IMPERFORATE AND UNTREATED METAL SUBSTRATE, FOLLOWING SPRAY APPLICATION THERETO, AND ABLE TO IMPART GREATLY IMPROVED FIRE RESISTANCE THERETO, CONSISTING ESSENTIALLY OF 100 POUNDS OF CALCINED GYPSUM, FROM ABOUT 40 TO ABOUT 64 POUNDS OF AN INORGANIC EXPANDED LOW DENSITY AGGREGATE, FROM ABOUT 25 TO ABOUT 50 POUNDS OF AN INORGANIC, FIBROUS MATERIAL, AND SUFFICIENT FOAMING AGENT TO PROVIDE AN INCREASE IN THE WET VOLUME, FOLLOWING AIR ENTRAINMENT, OF ABOUT 50% TO 100%, SAID CALCINED GYPSUM BEING AT LEAST ABOUT 45% OF SAID COMPOSITION.
Claim 2
Dependent Claim
99 words
A SETTABLE GYPSUM PLASTER COMPOSITION CAPABLE, UPON ADMIXTURE WITH WATER, OF TENACIOUSLY ADHERING TO A SUBSTANTIALY IMPERFORATE AND UNTREATED METAL SUBSTRATE, FOLLOWING SPRAY APPLICATION THERETO, AND ABLE TO IMPART GREATLY IMPROVED FIRE RESISTANCE THERETO, CONSISTING ESSENTIALLY OF 100 POUNDS OF CALCINED GYPSUM, FROM ABOUT 40 TO ABOUT 64 POUNDS OF AN INORGANIC EXPANDED LOW DENSITY AGGREGATE, FROM ABOUT 25 TO ABOUT 50 POUNDS OF AN INORGANIC, FIBROUS MATERIAL, AND SUFFICIENT FOAMING AGENT TO PROVIDE AN INCREASE IN THE WET VOLUME, FOLLOWING AIR ENTRAINMENT, OF ABOUT 50% TO 100%, SAID CALCINED GYPSUM BEING AT LEAST ABOUT 45% OF SAID COMPOSITION.
Claim 3
Dependent Claim
34 words
A FIRE-RETARDANT, SET GYPSUM PLASTER COMPOSITIONCOATED METAL STRUCTURAL MEMBER COMPRISING A SELF-BONDED COATING OF THE SET RESULTANT PRODUCT OF THE COMPOSITION OF CLAIM 1, BONDED TO THE SURFACE OF AN UNTREATED METAL STRUCTURAL MEMBER.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |