US3356781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of transfer molding
Assignee: Johns Manville Corp
•
Filing: 1963-10-03
•
Granted: 1967-12-05
•
Expires: 1983-10-03
Abstract
No abstract record available.
Inventors
- 👤 Chester J Sulewski
- 👤 John G Hedin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:51
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/46; B29C70/48; B29C43/00; B29C43/02; B29C43/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD FOR MAKING PLASTIC PIPE FITTINGS COMPRISING THE STEPS OF SUPPLYING A CONTINUOUS WEB OF ASBESTOS PAPER TO A SATURATING STEP, SATURATING THE WEB WITH A LIQUID RESIN COMPOSITION CONTAINING A CURABLE RESIN SELECTED FROM THE GROUP CONSISTING OF POLYESTER, EPOXY, EPOXY-NOVOLAC, PHENOLIC RESINS, AND MIXTURES THEREOF, A CURING AGENT FOR THE CURABLE RESIN AND A SOLVENT, REMOVING SUBSTANTIALLY ALL OF THE SOLVENT BY HEATING THE RESIN TO 150 TO 350*F. SUCH THAT THE CURING AGENT IS ABLE TO RE-
Claim 2
Independent Claim
81 words
A METHOD FOR MAKING PLASTIC PIPE FITTINGS COMPRISING THE STEPS OF SUPPLYING A CONTINUOUS WEB OF ASBESTOS PAPER TO A SATURATING STEP, SATURATING THE WEB WITH A LIQUID RESIN COMPOSITION CONTAINING A CURABLE RESIN SELECTED FROM THE GROUP CONSISTING OF POLYESTER, EPOXY, EPOXY-NOVOLAC, PHENOLIC RESINS, AND MIXTURES THEREOF, A CURING AGENT FOR THE CURABLE RESIN AND A SOLVENT, REMOVING SUBSTANTIALLY ALL OF THE SOLVENT BY HEATING THE RESIN TO 150 TO 350*F. SUCH THAT THE CURING AGENT IS ABLE TO RE-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |