Patent US3173460A successfully refreshed from Google Patents.
US3173460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reducing springback in pressed wood products
Assignee: Individual
•
Filing: 1962-08-02
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Granted: 1965-03-16
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Expires: 1982-08-02
Abstract
No abstract record available.
Inventors
- 👤 Robert A Hann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:10
CPC Classifications
B; B27; B27N; B27N7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS OF REDUCING SPRINGBACK IN A PRESSED WOOD PRODUCT HAVING SURFACES WHICH COMPRISES MAINTAINING SUBSTANTIALLY THE SAME PRODUCT THICKNESS BY INTERPOSING SAID SURFACES BETWEEN RESTRAINING MEANS WHICH ARE STATIONARY RELATIVE TO THE SWELLING OF SAID PRESSED WOOD PRODUCT, EXPOSING THE THUS RESTRAINED WOOD PRODUCT TO STEAM AT A PRESSURE OF ABOUT FROM 30 TO 100 POUNDS PER SQUARE INCH AND AT A TEMPERATURE OF ABOUT FROM 275* TO 340*F. FOR ABOUT 1 TO 10 MINUTES WHILE MAINTAINING A RELATIVE VAPOR PRESSURE OF AT LEAST 90% DURING THIS PERIOD TO CAUSE THE
Claim 2
Dependent Claim
92 words
A PROCESS OF REDUCING SPRINGBACK IN A PRESSED WOOD PRODUCT HAVING SURFACES WHICH COMPRISES MAINTAINING SUBSTANTIALLY THE SAME PRODUCT THICKNESS BY INTERPOSING SAID SURFACES BETWEEN RESTRAINING MEANS WHICH ARE STATIONARY RELATIVE TO THE SWELLING OF SAID PRESSED WOOD PRODUCT, EXPOSING THE THUS RESTRAINED WOOD PRODUCT TO STEAM AT A PRESSURE OF ABOUT FROM 30 TO 100 POUNDS PER SQUARE INCH AND AT A TEMPERATURE OF ABOUT FROM 275* TO 340*F. FOR ABOUT 1 TO 10 MINUTES WHILE MAINTAINING A RELATIVE VAPOR PRESSURE OF AT LEAST 90% DURING THIS PERIOD TO CAUSE THE
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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |