US2687359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasterboard
Assignee: Individual
•
Filing: 1950-01-30
•
Granted: 1954-08-24
•
Expires: 1970-01-30
Abstract
No abstract record available.
Inventors
- 👤 Dennis E Cleary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:17
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/14; E04F15/00; E04F15/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
A PREFORMED PLASTER BOARD COMPRISING A PANEL OF GYPSUM, A LAYER OF WATER- SETTING CEMENTGYPSUM MATERIAL APPLIED TO ONE SIDE OF SAID GYPSUM, SAID LAYER OF GYPSUM MATERIAL BEING MIXED WITH WATER AND WITH A LIGHT WEIGHT PLASTER AGGREGATE, AND A COATING OF WEST SODIUM SILICATE SOLUTION COVERING THE SIDE OF SAID LAYER THAT FACES AWAY FROM SAID PANEL, AND A DRY MIXTURE OF KEENE''S CEMENT AND HYDRATED LIME APPLIED TO THE COATING OF SODIUM SILICATE SOLUTION.
References Cited (Backward Citations)
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Cited
US233948A
Cited
US268535A
Cited
US897158A
Cited
US907876A
Cited
US971967A
Cited
US1076261A
Cited
US1549292A
Cited
US1777872A
Cited
US2083961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |