US2823157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective covering of leather
Assignee: United Shoe Machinery Corp
•
Filing: 1953-01-21
•
Granted: 1958-02-11
•
Expires: 1973-01-21
Abstract
No abstract record available.
Inventors
- 👤 Raymond P Hofferbert
- 👤 John P Szumski
- 👤 William L D Mckay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:30
CPC Classifications
B; B32; B32B; B32B27/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
THE METHOD OF PROTECTING LEATHER WHICH COMPRISES THE THREE PROCESS O FIRST DISPOSING A THIN SHEET OF HIGH MOLECULAR WEIGHT POLYETHYLENE SHEET AND SUBLEATHER SHEET AND HEATING THE POLYETHYLENE SHEET AND SUBSTANTIALLY SAID SURFACE ONLY OF THE LEATHER SHEET TO A TEMPERATURE NEAR BUT BELOW THE MELTING POINT OF THE POLYETHYLENE, SECONDLY PRESSING A HEATED SURFACE SIMULTANEOUSLY AGAINST ALL AREAS OF THE SHEET OF POLYETHLENE TO BE JOINED TO SAID LEATHER SURFACE TO MELT THE POLYETHYLENE TO FLUID CONDUCTION ON TO FORCE THE HOT FLUID POLYETHYLENE INTO THE SURFACE OF THE LEATHER, SAID HEATED SURFACE HAVINGA TEMPERATURE SUBSTANTIALLY ABOVE THE MELTING POINT OF THE POLYETHYLENE, AND THIRDLY COOLING THE HEATED SURFACE PROMPTLY AFTER ESTABLISHING PRESSURE TO REDUCE THE TEMPERATURE OF THE SURFACE TO A POINT WELL BELOW THE MELTING TEMPERATURE OF THE POLYETHYLENE AND THEREAFTER RELEASING SAID PRESSURE.
Claim 2
Independent Claim
138 words
THE METHOD OF PROTECTING LEATHER WHICH COMPRISES THE THREE PROCESS O FIRST DISPOSING A THIN SHEET OF HIGH MOLECULAR WEIGHT POLYETHYLENE SHEET AND SUBLEATHER SHEET AND HEATING THE POLYETHYLENE SHEET AND SUBSTANTIALLY SAID SURFACE ONLY OF THE LEATHER SHEET TO A TEMPERATURE NEAR BUT BELOW THE MELTING POINT OF THE POLYETHYLENE, SECONDLY PRESSING A HEATED SURFACE SIMULTANEOUSLY AGAINST ALL AREAS OF THE SHEET OF POLYETHLENE TO BE JOINED TO SAID LEATHER SURFACE TO MELT THE POLYETHYLENE TO FLUID CONDUCTION ON TO FORCE THE HOT FLUID POLYETHYLENE INTO THE SURFACE OF THE LEATHER, SAID HEATED SURFACE HAVINGA TEMPERATURE SUBSTANTIALLY ABOVE THE MELTING POINT OF THE POLYETHYLENE, AND THIRDLY COOLING THE HEATED SURFACE PROMPTLY AFTER ESTABLISHING PRESSURE TO REDUCE THE TEMPERATURE OF THE SURFACE TO A POINT WELL BELOW THE MELTING TEMPERATURE OF THE POLYETHYLENE AND THEREAFTER RELEASING SAID PRESSURE.
References Cited (Backward Citations)
GB641568A
Cited
US1208209A
Cited
US2070600A
Cited
US2032471A
Cited
US2219700A
Cited
US2236766A
Cited
US2358404A
Cited
US2462331A
Cited
US2413750A
Cited
US2564424A
Cited
US2622056A
Cited
US2622052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |