US3789858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental floss
Assignee: Individual
•
Filing: 1971-12-27
•
Granted: 1974-02-05
•
Expires: 1991-12-27
Abstract
Abstract Dental floss comprises a pair of strands twisted together. One strand is smooth and relatively strong, for example nylon. The other strand is relatively weak and has tufts at spaced intervals thereon for cleaning between the teeth and may be example cotton.
Inventors
- 👤 L Pesce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:49
CPC Classifications
A; A61; A61C; A61C15/00; A61C15/04; A61C15/041; A61C15/042
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
44 words
Dental floss comprising a pair of intertwined strands, both of said strands being polyfilamentary, one of said strands being smooth and stronger than the other of said strands, said other strand having a higher absorbency than said one strand and having spaced tufts thereon.
Claim 2
Dependent Claim
44 words
Dental floss comprising a pair of intertwined strands, both of said strands being polyfilamentary, one of said strands being smooth and stronger than the other of said strands, said other strand having a higher absorbency than said one strand and having spaced tufts thereon.
Claim 3
Dependent Claim
12 words
Dental floss as claimed in claim 1, said one strand being polyamide.
Claim 4
Dependent Claim
12 words
Dental floss as claimed in claim 1, said other strand being cotton.
Claim 5
Dependent Claim
12 words
Dental floss as claimed in claim 3, said cotton strand being slub.
Claim 6
Dependent Claim
19 words
Dental floss as claimed in claim 1, said one strand being nylon and said other strand being cotton slub.
References Cited (Backward Citations)
US1637153A
Cited
US2821202A
Cited
US2996872A
Cited
US3042482A
Cited
US3395527A
Cited
US3511249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |