US3770495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-adhesive high elastic elastomer threads
Assignee: Individual
•
Filing: 1971-10-28
•
Granted: 1973-11-06
•
Expires: 1991-10-28
Abstract
Abstract Normally sticky segmented polyurethane threads are rendered nonadhesive by coating with a dressing agent comprising tertiary phosphoric acid ester of the formula IN WHICH R1 and R2 are hydrocarbon radicals of the formula CnH2n 1 or CnH2n 1; n is 1 to 20; m is an integer of from 1 to 6; and R3 is hydrogen or methyl. The coating can optionally contain, as an additional ingredient, an ethylene oxide adduct of the formula
Inventors
- 👤 H Lenz
- 👤 J Kolbe
- 👤 H Marzolph
- 👤 K Bernklau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:37
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/292; D06M13/295; D06M7/00; D06M2200/00; D06M2200/40; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/31504; Y10T428/31551
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
The non-adhesive highly elastic thread of claim 1 wherein said coating consists essentially of a tertiary phosphoric acid ester of the formula
Claim 2
Dependent Claim
36 words
The non-adhesive highly elastic thread of claim 1 in which said polyurethane elastomer has an elongation at break of 400 to 800 percent and which consists of at least 85 percent of a segmented polyurethane elastomer.
References Cited (Backward Citations)
US1970578A
Cited
US2842462A
Cited
US2742379A
Cited
US2909559A
Cited
US2990421A
Cited
US3407150A
Cited
US3310935A
Cited
US3482010A
Cited
US3472919A
Cited
US3495394A
Cited
US3432343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |