US2549849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cork substitute and process for making same
Assignee: Individual
•
Filing: 1948-09-08
•
Granted: 1951-04-24
•
Expires: 1968-09-08
Abstract
No abstract record available.
Inventors
- 👤 Robert S Owens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:35
CPC Classifications
C; C08; C08L; C08L97/00; C08L97/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE PROCESS OF PRODUCING A CORK SUBSTITUTE WHICH COMPRISES REDUCING OUTER BARK OF PAPER BIRCH TREES WHILE PRESERVING THE CELLULAR STRUCTURE OF THE BARK, INCORPORATING A BINDER IN THE REDUCED BARK WHILE MAINTAINING THE BARK IN EXCESS OVER THE BINDER, AND BAKING THE RESULTING MIXTURE OF BARK AND BINDER AT A TEMPERATURE BELOW DESTRUCTIVE DISTILLATION OF THE BINDER UNTIL THE MIXTURE ATTAINS A PHYSICAL STRUCTURE SIMILAR TO CORK COMPOSITIONS.
Claim 2
Dependent Claim
69 words
THE PROCESS OF PRODUCING A CORK SUBSTITUTE WHICH COMPRISES REDUCING OUTER BARK OF PAPER BIRCH TREES WHILE PRESERVING THE CELLULAR STRUCTURE OF THE BARK, INCORPORATING A BINDER IN THE REDUCED BARK WHILE MAINTAINING THE BARK IN EXCESS OVER THE BINDER, AND BAKING THE RESULTING MIXTURE OF BARK AND BINDER AT A TEMPERATURE BELOW DESTRUCTIVE DISTILLATION OF THE BINDER UNTIL THE MIXTURE ATTAINS A PHYSICAL STRUCTURE SIMILAR TO CORK COMPOSITIONS.
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) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |