US3011903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for patching and repairing surface defects in plywood and the like and the articles resulting therefrom
Assignee: Dow Chemical Co
•
Filing: 1958-02-13
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Granted: 1961-12-05
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Expires: 1978-02-13
Abstract
No abstract record available.
Inventors
- 👤 Gerald E Clock
- 👤 Walter E F Rupprecht
- 👤 Ira J Cummings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:11
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/06; Y; Y10; Y10T; Y10T428/00; Y10T428/20; Y10T428/25; Y10T428/259; Y10T428/31504; Y10T428/31971; Y10T428/31989
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A PROCESS FOR UPGRADING CELLULOSIC BOARDS HAVING DEEP SURFACE DEFECTS CONSISTING ESSENTIALY OF THE STEPS OF (1) FILLING SAID DEFECTS WITH A MASTIC CONSISTING OF AN AQUEOUS POLYMER LATEX HAVING FILM FORMING CHARACTERISTICS UPON AIR DRYING AND A LEAST 50 PERCENT BY WEIGHT OF SAID MASTIC OF A HARD, GRANULAR FILLER HAVING A BULK DENSITY AT LEAST AS GREAT AS SAID CELLULOSIC BOARD AND HAVING AN AVERAGE PARTICLE SIZE OF FROM 40 TO 200 MESH AS MEASURED BY THE U.S STANDARD SIEVE SERIES, (2) DRYING SAID MASTIC AT A TEMPERATURE BELOW ABOUT 70*C., (3) SUBJECTING THE SO-TREATED ARTICLE TO CONDITIONS OF ELEVATED TEMPERATURE AND APPLIED PRESSURE TO SOFTEN THE MASTIC, (4) ALLOWING SAID MASTIC TO HARDEN, AND (5) SMOOTHERING THE SURFACE OF SO TREATED ARTICLES.
Claim 2
Dependent Claim
125 words
A PROCESS FOR UPGRADING CELLULOSIC BOARDS HAVING DEEP SURFACE DEFECTS CONSISTING ESSENTIALY OF THE STEPS OF (1) FILLING SAID DEFECTS WITH A MASTIC CONSISTING OF AN AQUEOUS POLYMER LATEX HAVING FILM FORMING CHARACTERISTICS UPON AIR DRYING AND A LEAST 50 PERCENT BY WEIGHT OF SAID MASTIC OF A HARD, GRANULAR FILLER HAVING A BULK DENSITY AT LEAST AS GREAT AS SAID CELLULOSIC BOARD AND HAVING AN AVERAGE PARTICLE SIZE OF FROM 40 TO 200 MESH AS MEASURED BY THE U.S STANDARD SIEVE SERIES, (2) DRYING SAID MASTIC AT A TEMPERATURE BELOW ABOUT 70*C., (3) SUBJECTING THE SO-TREATED ARTICLE TO CONDITIONS OF ELEVATED TEMPERATURE AND APPLIED PRESSURE TO SOFTEN THE MASTIC, (4) ALLOWING SAID MASTIC TO HARDEN, AND (5) SMOOTHERING THE SURFACE OF SO TREATED ARTICLES.
References Cited (Backward Citations)
US2199700A
Cited
US2419614A
Cited
US2486235A
Cited
US2635976A
Cited
US2663747A
Cited
US2554663A
Cited
US2656340A
Cited
US2658015A
Cited
US2770556A
Cited
US2837444A
Cited
US2930106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |