US3607507A
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Novel splicing method
Assignee: Monsanto Co
•
Filing: 1968-01-02
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Granted: 1971-09-21
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Expires: 1988-01-02
Abstract
Abstract Disclosed herein is a method for splicing the ends of thermally stable fibers, filaments, strands, wires, etc., which comprises applying a thermally stable imide-forming polymer to the ends to be spliced and then converting the imide-forming polymer to a polyimide.
Inventors
- 👤 Raymond J Enos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:58
CPC Classifications
D; D06; D06M; D06M23/00; D06M23/16; D06M23/18; B; B65; B65H; B65H69/00; B65H69/02; D01; D01F; D01F11/00; D01F11/10; D01F11/14; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/587; D04H1/64; B65H2701/00; B65H2701/30; B65H2701/31; B65H2701/312; B65H2701/314; B65H2701/37
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
11 words
applying an imide-forming polymer solution to the ends to be spliced,
Claim 2
Dependent Claim
24 words
The method of claim 1 wherein the imide-forming polymer is the polymeric reaction product of benzophenone tetracarboxylic acid dianhydride and an aromatic primary diamine.
Claim 3
Dependent Claim
12 words
applying an imide-forming polymer solution to the ends to be spliced, and
Claim 4
Dependent Claim
27 words
curing the imide-forming polymer to a thermally stable polyimide, wherein the curing of the imide-forming polymer is initiated by igniting the solvent in the imide-forming polymer solution.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein the imide-forming polymer is the polymeric reaction product of pyromellitic dianhydride and an aromatic primary diamine.
Claim 6
Dependent Claim
27 words
curing the imide-forming polymer to a thermally stable polyimide wherein the curing of the imide-forming polymer is initiated by igniting the solvent in the imide-forming polymer solution.
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein the imide-forming polymer is the polymeric reaction product of monoacid halide trimellitic dianhydride and an aromatic primary diamine.
Claim 8
Independent Claim
8 words
A method for splicing boron filaments which comprises:
Claim 9
Dependent Claim
24 words
The method of claim 5 wherein the imide-forming polymer is the polymeric reaction product of benzophenone tetracarboxylic acid dianhydride and an aromatic primary diamine.
Claim 10
Dependent Claim
22 words
The method of claim 5 wherein the imide-forming polymer is the polymeric reaction product of pyromellitic dianhydride and an aromatic primary diamine.
Claim 11
Dependent Claim
24 words
The method of claim 5 wherein the imide-forming polymer is the polymeric reaction product of monoacid halide trimellitic dianhydride and an aromatic primary diamine.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |