US3674733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colored heat shrinkable elastomeric tubing
Assignee: Penntube Plastics Co
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Filing: 1970-02-02
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Granted: 1972-07-04
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Expires: 1990-02-02
Abstract
Abstract This invention relates to polychloroprene based colored heat shrinkable elastomeric tubing having excellent electrical properties and to the method of manufacture.
Inventors
- 👤 Edmond R Ayella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:35
CPC Classifications
B; B29; B29D; B29D23/00; B29D23/001; C; C08; C08L; C08L11/00; B29K; B29K2021/00; C08K; C08K3/00; C08K3/34; C08K3/36; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1331
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
19 words
Tubing according to claim 1 wherein the Williams Plasticity Number of (b) at 150* F. is less than 300.
Claim 2
Dependent Claim
25 words
Tubing according to claim 1 wherein the amount of (b) is 50 to 90 percent and the amount of (a) is 10 to 50 percent.
Claim 3
Dependent Claim
34 words
Tubing according to claim 1 wherein the Williams Plasticity Number of (b) at 150* F. is at least 50 units less than the Williams Plasticity Number at 150* F. of (a) before said curing.
Claim 4
Dependent Claim
37 words
Tubing according to claim 1 further characterized in that the Williams Plasticity Number of (b) at 120* F. is at least 1,000 whereas the Williams Plasticity Number of (a) before said curing is substantially less than 1,000.
Claim 5
Dependent Claim
25 words
Tubing as in claim 1 also containing from about 7 to 15 parts by weight of calcium carbonate per 100 parts of total chloroprene polymer.
Claim 6
Dependent Claim
26 words
Tubing as in claim 1 also containing from about 10 to 20 parts by weight of a polyvinylchloride plasticizer per 100 parts of total chloroprene polymer.
Claim 7
Dependent Claim
20 words
Tubing as in claim 1 being further characterized by a ratio of expanded to recovered diameter of at least 2.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |