US2918696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for stretching thermoplastic sheet material
Assignee: Swedlow Plastics Co
•
Filing: 1956-07-26
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Granted: 1959-12-29
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Expires: 1976-07-26
Abstract
No abstract record available.
Inventors
- 👤 Paul H Bottoms
- 👤 Robert J Clapp
- 👤 Reuben H Loggins
- 👤 John G Stansbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:50
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/10; B29C55/12; B29C55/16; B29C55/165; Y; Y10; Y10S; Y10S425/00; Y10S425/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
IN A PROCESS FOR MULTIDIRECTIONALLY STRECHING THERMO-PLASTIC SHEET MATERIAL, THE STEPS COMPRISING HEATING THE MAIN BODY OF A THERMOPLASTIC SHEET TO A FORMING TEMPERATURE, MAINTAINING SPACED PORTIONS OF SAID SHEET ADJACENT THE EDGES THEREOF AND EXTENDING AROUND THE ENTIRE PERIPHERY THEREOF AT A TEMPERATUARE BELOW SAID FORMING TEMPERATURE, THE PORTIONS OF SAID SHEET ADJACENT THE EDGES AND BETWEEN SAID SPACED PORTIONS BEING HEATED TO
Claim 2
Dependent Claim
64 words
IN A PROCESS FOR MULTIDIRECTIONALLY STRECHING THERMO-PLASTIC SHEET MATERIAL, THE STEPS COMPRISING HEATING THE MAIN BODY OF A THERMOPLASTIC SHEET TO A FORMING TEMPERATURE, MAINTAINING SPACED PORTIONS OF SAID SHEET ADJACENT THE EDGES THEREOF AND EXTENDING AROUND THE ENTIRE PERIPHERY THEREOF AT A TEMPERATUARE BELOW SAID FORMING TEMPERATURE, THE PORTIONS OF SAID SHEET ADJACENT THE EDGES AND BETWEEN SAID SPACED PORTIONS BEING HEATED TO
References Cited (Backward Citations)
FR786370A
Cited
US2297645A
Cited
US2618012A
Cited
US2646647A
Cited
US2723108A
Cited
US2717766A
Cited
US2671987A
Cited
US2770007A
Cited
US2749572A
Cited
US2759217A
Cited
US2779053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |