US3728187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying alternate layers of plastic foam and glass fibers to a metal tube
Assignee: Individual
•
Filing: 1970-10-26
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Granted: 1973-04-17
•
Expires: 1990-10-26
Abstract
Abstract ALTERNATE LAYERS OF PLASTIC FOAM AND GLASS FIBER FABRIC BETWEEN INNER AND OUTER MOISTURE IMPERVIOUS WALLS OF GLASS FIBER FILAMENT-WOUND PLASTIC LAYERS FORMING A UNITARY JACKET APPLIED OVER A METAL TUBE WITH A SUBSTANCE BETWEEN THE TUBE AND THE JACKET PREVENTING ADHERENCE OF THE JACKET TO THE TUBE.
Inventors
- 👤 A Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:59
CPC Classifications
B; B29; B29D; B29D23/00; B29D23/001; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; B29C53/62; B29C53/66; B29D22/00; B29D22/003; F; F16; F16L; F16L59/00; F16L59/04; F16L59/14; F16L59/141; F16L59/143; B29K; B29K2309/00; B29K2309/08; B29L; B29L2009/00; B29L2009/003; B29L2023/00; B29L2023/22; B29L2031/00; B29L2031/712; Y; Y10; Y10S; Y10S220/00; Y10S220/23; Y10S220/902; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T428/31551; Y10T428/31645; Y10T428/31678; Y10T428/31692
Claims Analysis
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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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |