US3083128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardboard and method of manufacture
Assignee: Masonite Corp
•
Filing: 1958-05-14
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Granted: 1963-03-26
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Expires: 1978-05-14
Abstract
No abstract record available.
Inventors
- 👤 Charley W Herrington
- 👤 George G Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:25
CPC Classifications
D; D21; D21J; D21J1/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1039; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24595; Y10T428/24603
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A LIGNOCELLULOSE HARDBOARD SHEET ARTICLE CHARACTERIZED BY IMPROVED STIFFNESS AND DIMENSIONAL STABILITY WHICH COMPRISES AN INTEGRAL, CONSOLIDATED, DENSES FIBROUS SHEET HAVING ONE FLAT SURFACE, THE OTHER SHEET SURFACE CONTAINING A PLURALITY OF SPACED-APART PARALLEL RIB PORTIONS INTERCONNECTED BY DEPRESSED FLAT SHEET PORTIONS, EACH OF SAID RIB PORTIONS COMPRISING ESSENTIALLY AN ENLARGED MOLDED AREA HAVING A RELATIVELY DENSE HARD SHELL ENCLOSING A LOW SPECIFICE GRAVITY CORE, AND SAID DEPRESSED FLAT PORTIONS BEING OF SUBSTANTIALLY UNIFORM SPECIFIC GRAVITY.
Claim 2
Dependent Claim
76 words
A LIGNOCELLULOSE HARDBOARD SHEET ARTICLE CHARACTERIZED BY IMPROVED STIFFNESS AND DIMENSIONAL STABILITY WHICH COMPRISES AN INTEGRAL, CONSOLIDATED, DENSES FIBROUS SHEET HAVING ONE FLAT SURFACE, THE OTHER SHEET SURFACE CONTAINING A PLURALITY OF SPACED-APART PARALLEL RIB PORTIONS INTERCONNECTED BY DEPRESSED FLAT SHEET PORTIONS, EACH OF SAID RIB PORTIONS COMPRISING ESSENTIALLY AN ENLARGED MOLDED AREA HAVING A RELATIVELY DENSE HARD SHELL ENCLOSING A LOW SPECIFICE GRAVITY CORE, AND SAID DEPRESSED FLAT PORTIONS BEING OF SUBSTANTIALLY UNIFORM SPECIFIC GRAVITY.
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) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |