Patent US3236719A successfully refreshed from Google Patents.
US3236719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous structures containing glass fibers and other fibers
Assignee: Owens Corning
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Filing: 1961-08-14
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Granted: 1966-02-22
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Expires: 1981-08-14
Abstract
No abstract record available.
Inventors
- 👤 Jack H Waggoner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:14
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/18; D21H13/00; D21H13/36; D21H13/38; D21H13/40; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A FIBROUS STRUCTURE COMPRISING A LARGE PROPORTION OF GLAS FIBERS IN HAPHAZARD ARRANGEMENT IN A FELTED MASS, KRAFT PULP BINDING THE FIBERS TOGETHER INTO A MASS HAVING SUFFICIENT INTEGRITY, AND LIGNIN IN AMOUNTS TO REPLACE THAT REMOVED DURING THE MANUFACTURE OF THE KRAFT PULP TO IMPART GREATER INTEGRITY AND STRENGTH TO THE FIBROUS STRUCTURE.
Claim 2
Dependent Claim
54 words
A FIBROUS STRUCTURE COMPRISING A LARGE PROPORTION OF GLAS FIBERS IN HAPHAZARD ARRANGEMENT IN A FELTED MASS, KRAFT PULP BINDING THE FIBERS TOGETHER INTO A MASS HAVING SUFFICIENT INTEGRITY, AND LIGNIN IN AMOUNTS TO REPLACE THAT REMOVED DURING THE MANUFACTURE OF THE KRAFT PULP TO IMPART GREATER INTEGRITY AND STRENGTH TO THE FIBROUS STRUCTURE.
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |