US4093684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid solderable polyurethane data signal recording medium
Assignee: Monsanto Research Corp
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Filing: 1977-07-21
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Granted: 1978-06-06
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Expires: 1997-07-21
Abstract
Abstract In a process for data signal recording in which a recording medium is impinged upon by an intensity-modulated, focused laser beam to form a hole in at least one layer of the recording medium, the improvement wherein at least one layer of the recording medium comprises a polymer capable of undergoing residue-free depolymerization and the laser beam is of sufficient intensity to effect said depolymerization.
Inventors
- 👤 Leo P. Parts
- 👤 Edgar E. Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:48
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/245; B; B23; B23K; B23K26/00; B23K26/36; B23K26/40; B26; B26F; B26F1/00; B26F1/24; B29; B29C; B29C59/00; B29C59/16; G01; G01D; G01D15/00; G01D15/34; B23K2103/00; B23K2103/16; B23K2103/30; B23K2103/42; B23K2103/50; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0838; B29K; B29K2075/00; B29K2105/00; B29K2105/0005; B29K2105/0047; B29K2105/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
In a process for data signal recording in which a recording medium is impinged upon by an intensity-modulated, focused laser beam to form a hole in at least one layer of the recording medium, the improvement wherein said one layer of the recording medium comprises a solid, solderable polyurethane polymer having the capability for undergoing residue free depolymerization when subjected to laser irradiation, said solderable polyurethane polymer being the heat-cured reaction product of a blocked polyisocyanate adduct having from 11.5 to 13.5 percent available NCO, and a polyester having a hydroxyl number of from 270 to 420 and an acid number of from 4.0 to 9.0, and the beam is of sufficient intensity to effect said depolymerization.
Claim 2
Dependent Claim
117 words
In a process for data signal recording in which a recording medium is impinged upon by an intensity-modulated, focused laser beam to form a hole in at least one layer of the recording medium, the improvement wherein said one layer of the recording medium comprises a solid, solderable polyurethane polymer having the capability for undergoing residue free depolymerization when subjected to laser irradiation, said solderable polyurethane polymer being the heat-cured reaction product of a blocked polyisocyanate adduct having from 11.5 to 13.5 percent available NCO, and a polyester having a hydroxyl number of from 270 to 420 and an acid number of from 4.0 to 9.0, and the beam is of sufficient intensity to effect said depolymerization.
References Cited (Backward Citations)
US3311497A
Cited
US3249563A
Cited
US3256524A
Cited
US3441939A
Cited
US3314073A
Cited
US3824118A
Cited
US3594261A
Cited
US3549733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |